The factor that has the most greatest importance in determining the characteristics of an aquatic ecosystem will be water depth. The depth will determine the sunlight that the ecosystem will get. The answer will be B.
Symbiosis is a close relationship between two species in which at least one species benefits. For the other species, the relationship may be positive, negative, or neutral. There are three basic types of symbiosis: mutualism, commensalism, and parasitism.
Mutualism
Mutualism is a symbiotic relationship in which both species benefit. An example of mutualism involves goby fish and shrimp
Explanation:
Both prokaryotic and eukaryotic cells have:
DNA.
Ribosomes.
Cytoplasm.
Plasma membrane.
There are two events,
A: the selection belongs to the specific species, or
A' : the selection does not belong to the specific species.