Given a scientific passage and an answer, generate a question for the given answer.

Ex Input:
Passage: Insects spread disease and destroy crops. However, they are essential for pollinating flowering plants. Answer: insects

Ex Output:
What are essential for pollination, but can spread disease and destroy crops?

Ex Input:
Passage: New mitochondria and chloroplasts are produced through a process similar to binary fission . Bacteria also reproduce through binary fission. Answer: binary fission

Ex Output:
How do bacteria reproduce?

Ex Input:
Passage: Chromoplasts are plastids that contain other pigments. These other pigments give flowers and fruits their colors. Answer: chromoplasts

Ex Output:
What are plastids that contain other pigments?