Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each...

LQ

Lê Quỳnh Anh

11 tháng 10 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34. It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food Resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago. When approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

Which of the following is NOT mentioned in paragraph 1 as resulting from rapid ecological change?

A. Temperature changes

B. Availability of food resources

C. Introduction of new species

D. Competition among species

#Mẫu giáo

1

DH

Dương Hoàn Anh

11 tháng 10 2017

Chọn C

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LQ

Lê Quỳnh Anh

2 tháng 5 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example,...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be adapted. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, even affect organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. The periodic extinction might be due to intersection of the earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of revolutionary history may reflect a sequence of essentially random events.

Which of the following is NOT mentioned in paragraph 1 as resulting from rapid ecological change?

A. Temperature changes

B. Introduction of new species

C. Competition among species

D. Availability of food resources

#Mẫu giáo

1

DH

Dương Hoàn Anh

2 tháng 5 2017

Đáp án : B

Từ dòng 3 đoạn 1: Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be adapted. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition -> các đáp án đều được nhắc tới trừ đáp án B

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Lê Quỳnh Anh

2 tháng 6 2017

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures...

Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions

It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions, many species became extinct at the same time- a mass extinction. One of the best-known examples of mass extinction occurred 65 mmion years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affecting even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intensive every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

According to the passage, it is believed that the largest extinction of a species occourred _______.

A. 26 million years ago

B. 250 million years ago

C. 225 million years ago

D. 65 million years ago

#Mẫu giáo

1

DH

Dương Hoàn Anh

2 tháng 6 2017

Kiến thức: Đọc hiểu

Giải thích:

Theo đoạn văn, người ta tin rằng sự tuyệt chủng lớn nhất của một loài đã xảy ra ___.

A. 26 triệu năm trước B. 250 triệu năm trước

C. 225 triệu năm trước D. 65 triệu năm trước

Thông tin: Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died.

Tạm dịch: Có lẽ sự tuyệt chủng hàng loạt lớn nhất là xảy ra cách đây 225 triệu năm, khi mà gần như 95 phần trăm các loài sinh vật đã chết.

Chọn C

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Lê Quỳnh Anh

25 tháng 10 2019

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures...

Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions

It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions, many species became extinct at the same time- a mass extinction. One of the best-known examples of mass extinction occurred 65 mmion years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affecting even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intensive every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

Which of the following can be inferred from the theory of periodic extinction mentioned in paragraph 3?

A. The theory is no longer seriously considered

B. Many scientists could be expected to disagree with it

C. Most scientists believe the theory to be accurate

D. Evidence to support the theory has recently been found

#Mẫu giáo

1

DH

Dương Hoàn Anh

25 tháng 10 2019

Kiến thức: Đọc hiểu

Giải thích:

Điều nào sau đây có thể được suy ra từ lý thuyết tuyệt chủng định kỳ được đề cập trong đoạn 3?

A. Lý thuyết không còn được xem xét nghiêm túc

B. Nhiều nhà khoa học có thể sẽ không đồng ý với nó

C. Hầu hết các nhà khoa học tin rằng lý thuyết này là chính xác

D. Bằng chứng để hỗ trợ lý thuyết gần đây đã được tìm thấy

Thông tin: The periodic extinction might be due to intersection of the earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random…

Tạm dịch: Sự tuyệt chủng tuần hoàn này có thể do sự giao nhau của quĩ đạo trái đất với một đám mây của sao chổi, nhưng lý thuyết này hoàn toàn chỉ là suy đoán. Một số nhà nghiên cứu cũng suy đoán rằng sự tuyệt chủng này có thể xảy ra một cách ngẫu nhiên.

Chọn B

Dịch bài đọc:

Ước tính được rằng, có khoảng hơn 99 phần trăm các loài sinh vật đang tồn tại có nguy cơ tuyệt chủng. Vậy cái gì gây ra sự tuyệt chủng ấy ? Khi một loài không còn thích nghi được với sự biến đổi của môi trường, nó có thể sẽ chết. Nguyên nhân chính xác cho cái chết của chúng là do sự biến đổi từ môi trường này sang môi trường khác. Hệ sinh thái thay đổi nhanh chóng có thể khiến cho môi trường chống lại loài sinh vật. Ví dụ như, nhiệt độ thay đổi và sinh vật không thích ứng được. Nguồn thức ăn có thể bị ảnh hưởng bởi sự thay đổi môi trường, điều đó sẽ gây ra những vấn đề cho nhu cầu thức ăn của loài. Những loài khác có thể thích ứng tốt hơn,với môi trường, dẫn đến sự cạnh tranh, và cuối cùng, gây ra cái chết của cả một loài sinh vật..

Các mẫu hóa thạch cho thấy rằng sự tuyệt chủng đã xảy ra trong suốt lịch sự của trái đất. Những nghiên cứu gần đây cũng tiết lộ rằng trong một số trường hợp, nhiều loài đã tuyệt chủng cùng một lúc- sự tuyệt chủng hàng loạt. Một minh chứng rõ nhất được biết đến cho sự tuyệt chủng hàng loạt đã xảy ra cách đây 65 triệu năm với sự diệt vong của loài khủng long và nhiều loài khác. Có lẽ sự tuyệt chủng hàng loạt lớn nhất là xảy ra cách đây 225 triệu năm, khi mà gần như 95 phần trăm các loài sinh vật đã chết. Những sự tuyệt chủng hàng loạt có thể gây ra bởi sự thay đổi tương đối nhanh chóng của môi trường và có thể tồi tệ hơn bởi mối liên hệ mật thiết giữa các loài. Ví dụ như, nếu xảy ra sự tiêu diệt hầu hết các loài sinh vật nhỏ dưới đại dương, thì hàm lượng oxy sẽ giảm, thậm chí tác động làm các loài sinh vật sẽ không sống dưới đại dương nữa. Sự thay đổi như thế hầu như chắc chắn sẽ dẫn đến tuyệt chủng hàng loạt. .

Một phát hiện thú vị và gây ra tranh cãi đã chỉ ra rằng sự tuyệt chủng trong suốt 250 triệu năm qua có xu hướng gia tăng 26 triệu mỗi năm. Sự tuyệt chủng tuần hoàn này có thể do sự giao nhau của quĩ đạo trái đất với một đám mây của sao chổi, nhưng lý thuyết này hoàn toàn chỉ là suy đoán. Một số nhà nghiên cứu cũng suy đoán rằng sự tuyệt chủng này có thể xảy ra một cách ngẫu nhiên. Điều đó có nghĩa là, một số loài có thể bị loại bỏ và những loài khác có thể vẫn tồn tại mà không có một nguyên do rõ ràng nào cả. Sự sống của một loài sẽ không phụ thuộc vào khả năng có thể thích ứng được hay không của chúng. Do đó, một vài sự tiến hóa lịch sử có thể chính là sự phản ánh các sự kiện có bản chất ngẫu nhiên diễn ra liên tiếp.

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Lê Quỳnh Anh

12 tháng 5 2017

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures...

Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions

It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions, many species became extinct at the same time- a mass extinction. One of the best-known examples of mass extinction occurred 65 mmion years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affecting even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intensive every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

In paragraph 3, the author makes which of the following statements about a species survival?

A. It reflects the interrelationship of many species

B. It is associated with astronomical conditions.

C. It doesn't vary greatly from species to species.

D. It may depend on chance events.

#Mẫu giáo

1

DH

Dương Hoàn Anh

12 tháng 5 2017

Kiến thức: Đọc hiểu

Giải thích:

Trong đoạn 3, tác gải đã khẳng định gì về sự sống của một loài?

A. Nó phản ánh mối tương quan của nhiều loài.

B. Nó gắn liền với điều kiện thiên văn.

C. Nó không khác nhau nhiều từ loài này sang loài khác.

D. Nó có thể phụ thuộc vào các sự kiện ngẫu nhiên.

Thông tin: A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of revolutionary history may reflect a sequence of essentially random events.

Tạm dịch: Sự sống của một loài sẽ không phụ thuộc vào khả năng có thể thích ứng được hay không của chúng. Do đó, một vài sự tiến hóa lịch sử có thể chính là sự phản ánh các sự kiện có bản chất ngẫu nhiên diễn ra liên tiếp.

Chọn D

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Lê Quỳnh Anh

25 tháng 6 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42. It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42.

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species’ death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food Resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time – a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago. When approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events

Which of the following can be inferred from the theory of periodic extinction mentioned in paragraph 3?

A. Many scientists could be expected to disagree with it

B. Evidence to support the theory has recently been found

C. The theory is no longer seriously considered

D. Most scientists believe the theory to be accurate

#Mẫu giáo

1

DH

Dương Hoàn Anh

25 tháng 6 2017

Đáp án A

Từ học thuyết tuyệt chủng chu kì đuộc đề cập ở đoạn 3, có thể suy ra điều gì?

A. rất nhiều nhà khoa học có thể phản đối nó

B. hầu hết các nhà khoa học tin học thuyết này là đúng

C. học thuyết này không còn được xem xét một cách nghiêm túc nữa

D. bằng chứng để ủng hộ học thuyết này đã được tìm ra

Giải thích: Thông tin nằm ở “This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative”. Vì nó hoàn toàn là suy đoán nên ta có thể suy đoán rằng nó bị nhiều nhà khoa học khác phản đối

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Lê Quỳnh Anh

24 tháng 2 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34. It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food Resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago. When approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

Which of the following can be inferred from the theory of periodic extinction mentioned in paragraph 3?

A. Many scientists could be expected to disagree with it

B. Evidence to support the theory has recently been found.

C. The theory is no longer seriously considered.

D. Most scientists believe the theory to be accurate.

#Mẫu giáo

1

DH

Dương Hoàn Anh

24 tháng 2 2017

Chọn A

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Lê Quỳnh Anh

27 tháng 4 2019

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures...

Đọc tiếp

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions

It is estimated that over 99 percent of all species that have existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions, many species became extinct at the same time- a mass extinction. One of the best-known examples of mass extinction occurred 65 mmion years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago, when approximately 95 percent of all species died. Mass extinction can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affecting even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intensive every 26 million years. This periodic extinction might be due to intersection of the Earth's orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species' survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

What does the author say in paragraph 1 regarding most species in Earth's history?

A. They have been able to adapt to ecological changes

B. They have caused rapid changes in the environment

C. They have remained basically unchanged from their original forms

D. They are no longer in existence

#Mẫu giáo

1

DH

Dương Hoàn Anh

27 tháng 4 2019

Kiến thức: Đọc hiểu

Giải thích:

Ở đoạn 1, tác giả đã nói gì liên quan đến sinh vật trong lịch sử Trái đất ?

A. Họ đã có thể thích nghi với những thay đổi sinh thái.

B. Chúng đã gây ra những thay đổi nhanh chóng trong môi trường.

C. Về cơ bản chúng vẫn không thay đổi so với dạng ban đầu của chúng.

D. Chúng không còn tồn tại.

Thông tin: It is estimated that over 99 percent of all species that ever existed have become extinct.

Tạm dịch: Ước tính được rằng, có khoảng hơn 99 phần trăm các loài sinh vật đang tồn tại có nguy cơ tuyệt chủng.

Chọn D

Đúng(0)

LQ

Lê Quỳnh Anh

30 tháng 4 2019

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34. It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 28 to 34.

It is estimated that over 99 percent of all species that ever existed have become extinct. What causes extinction? When a species is no longer adapted to a changed environment, it may perish. The exact causes of a species' death vary from situation to situation. Rapid ecological change may render an environment hostile to a species. For example, temperatures may change and a species may not be able to adapt. Food Resources may be affected by environmental changes, which will then cause problems for a species requiring these resources. Other species may become better adapted to an environment, resulting in competition and, ultimately, in the death of a species.

The fossil record reveals that extinction has occurred throughout the history of Earth. Recent analyses have also revealed that on some occasions many species became extinct at the same time - a mass extinction. One of the best-known examples of mass extinction occurred 65 million years ago with the demise of dinosaurs and many other forms of life. Perhaps the largest mass extinction was the one that occurred 225 million years ago. When approximately 95 percent of all species died, mass extinctions can be caused by a relatively rapid change in the environment and can be worsened by the close interrelationship of many species. If, for example, something were to happen to destroy much of the plankton in the oceans, then the oxygen content of Earth would drop, affection even organisms not living in the oceans. Such a change would probably lead to a mass extinction.

One interesting, and controversial, finding is that extinctions during the past 250 million years have tended to be more intense every 26 million years. This periodic extinction might be due to intersection of the Earth’s orbit with a cloud of comets, but this theory is purely speculative. Some researchers have also speculated that extinction may often be random. That is, certain species may be eliminated and others may survive for no particular reason. A species’ survival may have nothing to do with its ability or inability to adapt. If so, some of evolutionary history may reflect a sequence of essentially random events.

In paragraph 3, the author makes which of the following statements about a species’ survival?

A. It reflects the interrelationship of many species.

B. It may depend on chance events.

C. It does not vary greatly from species to species

D. It is associated with astronomical conditions.

#Mẫu giáo

1

DH

Dương Hoàn Anh

30 tháng 4 2019

Chọn B

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