Answer:
nucleus im pretty sure haha
Explanation:
I think they are called Atoms
Lets make a scenario. There is a species of monkey that reproduce in trees, and earthquake rattles the trees causing most of the trees to fall down. They can not reproduce now unless they do so out the trees. Birds for instance may have this problem. Same thing for animals that may live in trees. They can no longer do so.
There are guard cells surrounding each stoma that cause them to open or close throughout the life cycle of the plant. This occurs in response to water and ions concentration in the plant cell.
