The group of animals that group or live together are called
analogies. Analogies are structures that
result from convergent evolution - species from different evolutionary branches
= no shared ancestry similar appearance examples - wings of bees and bats,
Australian mole an North American mole - both look similar, they occupy the
same niche.
Answer:
I'm presuming you mean the three different subcatagories or taxa as there around 25/26 mammalian orders. The three taxa are - Prototheria or Monotreme = Mammals that lay eggs Metatheria Marsupial = Mammals with external development pouches.
Explanation:
The answer is DNA replication