Lack of predators.
An abundance of Food.
The expression would be $0.20 x f. Once you figure out what the 'f' variable stands for, you have to multiply it by $0.20, and you will have your answer.
Answer:
I'm pretty sure the answer is a Tundra.
Explanation:
It's the only biome that has snow out of every other answer choice. Snowy places are naturally cooler than humid ones.
Answer:
Virus can survive independently for many years.
Explanation:
independently because they cant live if they cant connect to the host cell
