B19 , b20 help!!

need answer

pls also check my other questions!

In which process is oxygen absorbed by an organism asap apex

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight.which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.

What are the two main phases of a cell cycle