Given a scientific question, generate a correct answer to it.

Ex Input:
What can happen if there is a blockage in circulation to the brain?

Ex Output:
stroke

Ex Input:
What is the name for the stratospheric gas layer that protects living things from uv radiation?

Ex Output:
ozone layer

Ex Input:
A plant that forms special tissues for storing water in an arid climate is an example of the plant evolving what?

Ex Output:
adaptations