Hey there!
The purpose of guard cells is to control the opening and closing of the Stomata, keeping it the correct width, or size.
Therefore, your correct answer would be Option 3, control the size of the Stomata.
Hope this helps!
Answer:
B Physical separation of populations prevents interbreeding and mixing of gene pools.
Explanation:
Geographic isolation means two populations are unable to reproduce with one another. This means that over time, the variation in the gene pool will be different for one group compared to the other, and the species will genetically diverge from one another. resulting in speciation.
I believe the thyroid controls most, if not all of those things. (Again, I'm not entirely sure.)
Hi the answer is circumstantial-situational drug use. Hope this helps.
Answer:
they us concentrated scopes that go directly out of the atmosphere without any interruption
