A population of deer live in a forest ecosystem. Which of these describes a density-independent factor that could affect this population? A. An invasive species causes increased competition for space.

B. A new predator is introduced into the ecosystem.

C. A wildfire occurs in the ecosystem.

D. The deer population's food supply decreases.

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car