animal sex

Humans and animals value size and strength when choosing a partner, especially in tough circumstances for survival.

When the female clownfish disappears from the family nucleus, the male changes sex and becomes female to ensure the survival of the offspring.

Individuals of this species that remain in their birth group are as reproductively successful as those that leave.

Sex is necessary for many things, including generating genetic variability. However, it reduces the biodiversity of the species. Why? Among other things, because the greater the genetic variability, the faster new species are generated, but each of them has a low number of individuals, which implies that they have a greater probability of becoming extinct.