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New World monkeys and Old World monkeys were once one big family, then there was migration and the start of new and different primates. Their distinctions are quiet visible.

12

Mating is the most fundamental and vital process for animals to select for their best partners. In the view of biology, mating refers to the pairing of opposite-sex for copulation (the union of the sex organs of two sexually reproducing animals for insemination and subsequent internal fertilization) in social animal to breed for their offspring.