The earth is a closed system, which means that___ -only energy comes in from the outside
-nothing comes in from the outside
-the magnetic field of the earth pushes out harmful solar radiation
-only energy and matter flows in and out

explanation:

the fossil record extends back to a dog-like ancestor some 55 million years ago, which gave rise to the first horse-like species 55 to 42 million years ago in the genus eohippus.

population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

here is your answer hope i .