Prothallus represents a gametophyte in the life cycle of fern.
A prothallium, or prothallus<span> (from Latin pro = forwards and Greek θαλλος (thallos) = twig) is usually the gametophyte stage in the life of a fern or other pteridophyte. Occasionally the term is also used to describe the young gametophyte of a liverwort or peat moss as well.
so the answer should be prothallus</span>
The metabolic waste found in fetuses is excreted through the umbilical cord back to the mother. Some of it goes to the <span>amniotic fluid which can be seen when the baby is born.</span>
<span>The biological system of classification relates to the diversity of species because the system of classification is how we organize the diversity of species. With out it we would have a hard time trying to determine which animals belong with which </span><span><span>group. There would be no order, just chaos of trying to determine animal likeness of one another.
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We also know which fossils are older and/or younger than others collected, discovered, or found
B is the answer they provide energy