50. Pheromone systems are relatively complex in insects that (A) also communicate using sight and sound (B) live underground (C) prey on other insects (D) live in organized groups

47. According to paragraph 2, which of the following has made the study of pheromones difficult? (A) Pheromones cannot be easily reproduced in chemical laboratories. (B) Existing technology cannot fully explore the properties of pheromones. (C) Pheromones are highly volatile. (D) Pheromone signals are constantly changing.

50. Pheromone systems are relatively complex in insects that (A) also communicate using sight and sound (B) live underground (C) prey on other insects (D) live in organized groups

其他試題

50. Pheromone systems are relatively complex in insects that
(A) also communicate using sight and sound
(B) live underground
(C) prey on other insects
(D) live in organized groups