In plants that undergo double fertilization, the structure that forms to nourish the seed is called the endosperm.
egg cell.
gamete.
cone.

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

"a.) well–developed vascular system."

i won't lie i don't know so go online and ask google thats what i do