1. Evolve/Grow
2. Disappear
It's because they can survive and reproduce while the unfavorable die off and cannot reproduce, so their traits disappear from the gene pool.
Answer: A wide variety of microorganisms reproduce asexually. Protozoans, bacteria and a group of algae called diatoms reproduce through fission. The simple microscopic animals known as cnidaria, and the annelids, also called ringworms, reproduce through fragmentation.
Explanation:
A rock falling through Earth's atmosphere from outer space is called a asteroid