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. 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 on the ground and depositing a tiny amount of trail ...
Nguyễn Thị Sen | Chat Online | |
01/09 22:16:14 (Tiếng Anh - Lớp 12) |
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.
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 on 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 Attatexana 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 onto the 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 word “intermittently” in the passage is closest in meaning to _______.
Lựa chọn một trả lời để xem Đáp án chính xác Báo sai đáp án hoặc câu hỏi |
A. lazily 0 % | 0 phiếu |
B. happily 0 % | 0 phiếu |
C. periodically 0 % | 0 phiếu |
D. incorrectly 0 % | 0 phiếu |
Tổng cộng: | 0 trả lời |
Trắc nghiệm liên quan
- Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the each of the questions.Unlike previous generations, millennials look further than job stability, competitive salaries and benefits to be committed and ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the each of the questions.Unlike previous generations, millennials look further than job stability, competitive salaries and benefits to be committed and ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the each of the questions.Unlike previous generations, millennials look further than job stability, competitive salaries and benefits to be committed and ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the each of the questions.Unlike previous generations, millennials look further than job stability, competitive salaries and benefits to be committed and ... (Tiếng Anh - Lớp 12)
- Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the each of the questions. Unlike previous generations, millennials look further than job stability, competitive salaries and benefits to be committed and ... (Tiếng Anh - Lớp 12)
- Two school boys are talking to each other. Harry: “Were you chosen for our school football team? Porter: “_______” (Tiếng Anh - Lớp 12)
- The waiter is talking to a man in a restaurant. - Waiter: “_______” - Man: “No, I’m full already.” (Tiếng Anh - Lớp 12)
- The committee, in an earlier report, was accused of sweeping financial problems under the carpet to avoid embarrassment (Tiếng Anh - Lớp 12)
- Choose the word or phrase OPPOSITE in meaning to the underlined part in each of the following sentencesWork efficiency has increased appreciably each year thanks to computers and their ability to multitask (Tiếng Anh - Lớp 12)
- Their father got married to another woman 3 years after their mother’s death and they learned to accept stepmother in time (Tiếng Anh - Lớp 12)
Trắc nghiệm mới nhất
- Yếu tố nền tảng của kiểm soát nội bộ là (Tổng hợp - Đại học)
- Tổ chức đầu tiên trên thế giới nghiên cứu về gian lận là: (Tổng hợp - Đại học)
- Tác giả của mô hình tam giác gian lận là ai? (Tổng hợp - Đại học)
- Mô hình tam giác gian lận trình bày về vấn đề gì? (Tổng hợp - Đại học)
- Theo Cressey, có bao nhiều nguyên nhân chính làm nảy sinh áp lực dẫn đến hành vi gian lận? (Tổng hợp - Đại học)
- d) Một nhà kho có diện tích là 475 m2. Người ta muốn chia khu vực này thành các ô nhỏ, mỗi ô có diện tích 9,5 m2. Hỏi có thể chia được bao nhiêu ô? (Toán học - Lớp 5)
- Theo ACFE, các loại gian lận phổ biến gồm: (Tổng hợp - Đại học)
- c) Biểu thức nào sau đây có giá trị lớn nhất? (Toán học - Lớp 5)
- b) 5,2 không là thương của phép chia nào dưới đây? (Toán học - Lớp 5)
- Theo ACFE, những ai là người phát hiện gian lận nhiều nhất: (Tổng hợp - Đại học)