Question

[Lê Quỳnh Anh]

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 following questions from 35 to 42.

What unusual or unique biological train led to the remarkable diversification and unchallenged success of the ants for over 50 million years? The answer appears to be that they were the first group of predatory eusocial insects that both lived and foraged primarily in the soil and in rotting vegetation on the ground. Eusocial refers to a form of insect society characterized by specialization of tasks and cooperative care of the young; it is rare among insects. Richly organized colonies of the land made possible by eusociality enjoy several key advantages over solitary individuals.

Under most circumstances groups of workers are better able to forage for food and defend the nest, because they can switch from individual to group response and back again swiftly and according to need. When a food object or nest intruder is too large for one individual to handle, nestmates can be quickly assembled by alarm or recruitmentsignals. Equally important is the fact that the execution of multiple-step tasks is accomplished in a series-parallelsequence. That is, individual ants can specialize in particular steps, moving from one object (such as a larva to be fed) to another (a second larva to be fed). They do not need to carry each task to completion from start to finish - for example, to check the larva first, then collect the food, then feed the larva. Hence, if each link in the chain has many workers in attendance, a sense directed at any particular object is less likely to fail. Moreover, ants specializing in particular labor categories typically constitute a caste specialized by age or body form or both. There has been some documentation of the superiority in performance and net energetic yield of various castes for their modal tasks, although careful experimental studies are still relatively few.

What makes ants unusual in the company of eusocial insects is the fact that they are the only eusocial predators(predators are animals that capture and feed on other animals) occupying the soil and ground litter. The eusocial termites live in the same places as ants and also have wingless workers, but they feed almost exclusively on dead vegetation.

(Source: TOEFL Reading)

According to the passage, one thing eusocial insects can do is rapidly switch from ______ .

A. a defensive to an offensive stance 

B. a solitary task to a group task 

C. one environment to another 

D. one type of food consumption to another 

Answer 1

[Dương Hoàn Anh]

Chọn B

Kiến thức: Đọc hiểu

Giải thích:

Theo đoạn văn, một điều côn trùng eusocial có thể làm là nhanh chóng chuyển từ_______ .

  A. thế phòng thủ để sang thế tấn công

  B. một nhiệm vụ đơn độc thành một nhiệm vụ nhóm

  C. môi trường này thành môi trường khác

  D. một loại tiêu thụ thực phẩm này thành loài khác

Thông tin: Under most circumstances groups of workers are better able to forage for food and defend the nest, because they can switch from individual to group response and back again swiftly and according to need.

Tạm dịch: Trong hầu hết các trường hợp, các nhóm kiến thợ có khả năng tìm thức ăn và bảo vệ tổ tốt hơn, bởi vì chúng có thể chuyển từ phản ứng cá nhân sang phản ứng của nhóm và quay lại nhanh chóng theo nhu cầu