Answer:
endosymbiosis.
Explanation:
By the beginning of the 20th century, researchers thought that plastids and mitochondria could come from bacteria. These would have been ingested by primitive cells and live within them in symbiosis.
Answer:
A. Populations were separated through geographical isolation.
Explanation:
A)Movement
Tress or plants can't move they can grow, reproduce and evolve but not move.
Adult frogs are on land and they have feet and a body
Tadpoles are in water and they are somewhat like a fish!