C. plants don't need oxygen, they need carbon dioxide and PRODUCE oxygen. Animals DO. Need oxygen, I mean.
Answer:
I don't think there is a #6, so I'm gonna answer the "Mammals and plants don't belong in the same domain".. If this is the wrong one I can help with the one you actually need help with.
Explanation:
Myth: Mammals and plants don't belong in the same domain.
Fact: Mammals, being a group of animals do not belong in the same domain as plants. Evidence: All living organisms are divided into three domains: Bacteria, Archaea and Eukarya. All of the organisms that possess a eukaryotic cell, plants, animals, protists, and fungi are in the Eukarya domain. Therefore, mammals and plants belong to the same domain, the Eukarya domain.
These had no leaves or roots, instead they had green photosynthetic stems which served as both anchors in the ground and photosynthetic surface.