The author mentions the trail pheromone of the leafcutter ant in line 11 to point out
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Tác giả đã đề cập đến pheromone dấu vết của loài kiến cắt lá ở dòng 11 để chỉ ra
A. cần ít pheromone để đánh dấu đường
B. các loại kiến pheromone khác nhau có thể tạo ra
C. một loại kiến phổ biến ở nhiều nơi trên thế giới
D. rằng một số loài kiến có thể tạo ra tới một miligam pheromone
Đáp án A
Thông tin ở đoạn sau: “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.” (Không giống như những lời nhắn khác, ví dụ như cái phát ra từ một con kiến chết, một dấu vết thức ăn phải được giữ bí mật với các thành viên của các loài khác. Thật không ngạc nhieen khi các loài kiến sử dụng nhiều nhiều hợp chất khác nhau làm chất khống chế dấu vết. Các con kiến có thể cực kì nhạy cảm với những kí hiệu này. Các nhà điều tra làm việc với chất chi phối dấu vết của kiến xén lá Attatexana đã ước tính rằng cứ 1 milligram chất này sẽ đủ để dẫn dắt một cột kiến gấp 3 lần vòng quanh trái đất.)
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