Answer:
Gamete and bacterial cell.
Answer:
1,3,4
A dichotomous key uses questions or statements to help identify organisms, it also uses characteristics in it's questions ( that may be yes-no) and statements to help separate organisms from one another.
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Explanation:
Energy is catch by producers then given in a linear
progression from one tropic level to the next. At each level, much of the
energy escapes the ecosystem as heat. Unlike this one-way flow of energy,
matter is recycled within and between ecosystems. Elements passage from one
organism to another and among parts of the non-living environment through
closed loops called biochemical cycles.