For the first question, I would say a line graph. And the one about the human heart, I need some more information.
Answer:
Red algae - acquired plastids by secondary endosymbiosis
Explanation:
Red algae are believed to have undergo a primary endosymbiosis event. Then a second endosymbiosis event created a large group known as heterokonts. During the primary endosymbiosis event red algae acquire their plastids.
What grade are you in if you are in 5th or 6th i can help you
