TOEFL Listening: ETS-TOEFL听力机经 - 34Z41K1A9M1Z8N35P$

What is the purpose of the lecture? A. To suggest that cryptic patterns in the animal kingdom can be reduced to only a few basic forms B. To explain how cephalopods change cryptic patterns based on their visual perception C. To contrast underwater and dryland crypsis strategies D. To trace the evolution of crypsis in animals as a defense against predators