Prokaryotes do not contain membrane, and eukaryotes do contain membrane.
A habitat is a place where an organism makes its home. A habitat meets all the environmental conditions an organism needs to survive. For an animal, that means everything it needs to find and gather food, select a mate, and successfully reproduce.
Answer:
1: 50 million years
2: The forefeet changed over time by the bones merging into one to create the hoofed feet that we are used to today.
3: Their teeth and skull changed over time to better fit the environment and food they fed on. Their feet and hight changed based on the physical requirements of the environment like walking across dense forests vs open prairies and how they had to move to access food.
4: The environment affected the way the horses evolved because they had to evolve to better fit and survive/thrive the new environments they lived in.
