Answer:
A.
Explanation:
Humans used to use the appendix for good bacterial health in the gut. People used to drink dirty water and eat food that had lots of bacteria. The appendix would save them from infection.
Common cold is caused by a virus. Antibiotics work on living things (anti-life) and viruses are non-living.
<span>The only traits that can be acted upon by natural selection are those that are controlled by ___________________</span>
I'd also say that the morphology presented in this picture is filamentous.
The reason for my believing this is that filamentous morphology concerns long visible chains, threads, or filaments, which you can see in the image.
