A) Gestation
Gestation is the <span>period of time between conception and birth when a baby grows and develops inside the mother's womb.</span>
The stomata and their guard cells allows this happen.
Stomata is like a hole or gap on a leaf, most of them are present in a bottom side of the leaf, since waxy cuticle is not present over there. And 2 guard cells make up a stomata.
Guard cells are able to control the size of the stomata, depending on the situation. For example, the guard cells close up during day time because a lot of sunlight may cause more water loss.
In conclusion, guard cells and the stomata are the main structures that allow carbon dioxide and oxygen (water too) diffuse in and out of leaves.
The answer to this is the remains and waste products of plants, animals and other living things organisms.
The homology of animals is based on scientists current understanding on the evolutionary history of living species.
