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 ...
Bạch Tuyết | Chat Online | |
01/09 22:16:26 (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
What does the word “it” in paragraph 3 refer to?
Lựa chọn một trả lời để xem Đáp án chính xác Báo sai đáp án hoặc câu hỏi |
A. signal 0 % | 0 phiếu |
B. ant 0 % | 0 phiếu |
C. antenna 0 % | 0 phiếu |
D. space 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 correct answer to each of the questions.Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed ... (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 ... (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)
- 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)
Trắc nghiệm mới nhất
- Trong Powerpoint, bản mẫu có tên là gì? (Tin học - Lớp 8)
- Header là phần nào của văn bản? (Tin học - Lớp 8)
- Dạng thông tin giống nhau xuất hiện ở đầu trang hoặc chân các trang được xem như là? (Tin học - Lớp 8)
- Để chèn ảnh vào văn bản thì ta chọn lệnh? (Tin học - Lớp 8)
- Để chèn ảnh vào văn bản thì ta đặt con trỏ tại? (Tin học - Lớp 8)
- Lệnh Shape Fill nằm trong dải lệnh nào dưới đây? (Tin học - Lớp 8)
- Phần I. Trắc nghiệm (4 điểm) Câu 1: Để hiệu chỉnh màu nền thì ta chọn lệnh (Tin học - Lớp 8)
- Đọc văn bản sau và trả lời các câu hỏi bên dưới: Công nghệ càng trở nên ưu việt sau khi đón tiếp sự ra đời của những chiếc điện thoại thông minh, hay còn gọi là smartphone. Vậy nên điện thoại thì thông minh nhưng người dùng nó, đặc biệt là người trẻ ... (Ngữ văn - Lớp 8)
- Tình huống nào sau đây cần có nguồn nhân lực phát triển phần mềm? (Tin học - Lớp 8)
- Các ngành nghề đào tạo nào hướng đến việc làm trong lĩnh vực tin học? (Tin học - Lớp 8)