External fertilization occurs in which type of environment?
aquatic
forested
savanna
steppe

Aquatic

Explanation:

In aquatic environments, most of the upper and inferior eukaryons have external reproduction systems, for example, egg lying or free disposal of sperm. This is a common feature on fishes, mollusks, crustaceans, sea-worms, sponges and other lower forms.

It does not count for mammals, having these latest internal systems of reproduction.

All the other environment named, are terrestrial. Where the most majority of the living being had evolved to use internal fecundation.

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.