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>
3) Heat and gases contracted within a nubula
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Plant hormones are chemical plants use for communication, coordination, and development between their many cells.
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Davinia.
This basically electrophoresis so it requires understanding where certain parts of the gel match I suggest a reference