Câu hỏi:
31/03/2020 437Read the following passage and mark the letter A, B, C ,or D on your answer sheet to indicate the correct answer for each of the questions.
Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone – a mixture of chemicals that delivers diverse messages as the context changes.
These trails incorporate no directional information and may be followed by other ants in either direction.Unlike some other messages, such as the one arising from a dead ant, a food trail has to be kept secret from members of other species. It is not surprising then that ant species use a wide variety of compounds as trail pheromones. Ants can be extremely sensitive to these signals. Investigators working with the trail pheromone of the leafcutter ant Atta texana calculated that one milligram of this substance would suffice to lead a column of ants three times around Earth.
The vapor of the evaporating pheromone over the trail guides an ant along the way, and the ant detects this signal with receptors in its antennae. A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail, in what is called a vapor space. In following the trail, the ant moves to the right and left, oscillating from side to side across the line of the trail itself, bringing first one and then the other antenna into the vapor space. As the ant moves to the right, its left antenna arrives in the vapor space. The signal it receives causes it to swing to the left, and the ant then pursues this new course until its right antenna reaches the vapor space. It then swings back to the right, and so weaves back and forth down the trail.
The phrase “the one” in line 8 refers to a single
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Trả lời:
Giải bởi Vietjack
Đáp án A
Cụm từ "the one" trong dòng 8 đề cập đến một
A. thông điệp
B. con kiến chết
C. đường kiếm ăn
D. loài
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning
It started to rain at 2 o’clock and it is still raining
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Câu 2:
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning
Had she read the reference books, she would have been able to finish the test.
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Câu 3:
Mark the letter A, B, C or D on your answer sheet to indicate the word or phrase that is closest in meaning to the underlined part in each of the following questions.
His new yacht is certainly an ostentatious display of his wealth
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Câu 4:
Do you know that beautiful lady over there?” - “Yes, that’s Victoria. She’s ____ in her group.”
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Câu 5:
Could you stand_________ for me and teach my English class tomorrow morning, John?
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Câu 6:
Mark the letter A, B, C, or D on your answer sheet to indicate the word OPPOSITE in meaning to the underlined word(s) in each of the following questions
The bank announced that it was to merge with another of the high street banks.
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