Answer:
A virus is alive; it can respond and/or adapt to changes in the environment.
Explanation:
Herpes simplex virus 1 is a sexually transmitted virus that causes genital herpes.The herpes virus is contagious can be spread through contact with saliva, such as sharing drinks. The virus is alive and responds to changes in environment by adapting to living in body fluids.
The ecological pyramid is smaller at the top due to the lower amount of species to fit into the category (diversity is decreased, and the higher, the more suppressed the energy is in the animals/species).
B it's a vegstigial trait
Many biology texts today still refer to the appendix as a vestigial organ
