Answer: When the plant has enough water in its cells the guard cells swell up and open the stomata. When the plant isn't getting enough water the guard cells can't swell and the stomata stay closed, so the plant doen's lose water. But if the stomata are closed photosynthesis can't happen and eventually the plant might starve.
Explanation:
Option C : oxygen and Option B: nutrients
<span>Many traits require the concerted action of multiple genetic loci, often in combination with the environment.</span>
When the body works in the opposite direction it is know as Negative feedback
Answer:
I think its the tropics, if not it would be super helpful if you could provide the answer choices if there are any.