instruction:
Given a scientific passage and an answer, generate a question for the given answer.
question:
Passage: Whales and bats have the trait of echolocation. This is the ability to locate objects in the dark by bouncing sound waves off them. The most recent common ancestor of whales and bats did not have this trait. Apply lesson concepts to explain how the trait evolved in whales and bats. Answer: echolocation
answer:
What term is defined as the ability to locate objects in the dark by bouncing sound waves off them.

question:
Passage: Plants alternate between diploid-cell plants and haploid-cell plants. This is called alternation of generations , because the plant type alternates from generation to generation. In alternation of generations, the plant alternates between a sporophyte that has diploid cells and a gametophyte that has haploid cells. Answer: alternation of generation
answer:
When plant type alternates from generation to generation what is this called?

question:
Passage: Chromoplasts make and store pigments that give petals and fruit their orange and yellow colors. Answer: chromoplasts
answer:
What makes and stores pigments that give petals and fruit their orange and yellow colors?