Characteristics such as appearance, reproduction, mobility, and functionality are just a few ways in which living organisms are grouped together. These specialized groups are collectively called the classification of living things.
We live now in an eon of 542 million years in which abundant animal and plant life has existed. It is the Phanerozoic eon. Therefore, the correct answer is B. Phanerozoic.
Answer:
for testing differnt cures on animals
Explanation:
