instruction:
In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.
question:
Question: Which of the following best describes a role of mushrooms in ecosystems? Answer: breaking down dead plant material
answer:
A role of mushrooms in ecosystems is breaking down dead plant material.


question:
Question: The amniotic egg first evolved in what species? Answer: reptiles
answer:
The amniotic egg first evolved in reptiles.


question:
Question: The electrochemical potential across a membrane determines the tendency of an ion to do what? Answer: cross the membrane
answer:

The electrochemical potential across a membrane determines the tendency of an ion to do cross the membrane.