On early earth, approximately 3.5 billion years ago: the first microbial mats (biofilm aggregations of prokaryotes) likely harvested energy through

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.

Everything that surrounds a particular organism

Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet