Answer:
The Earth's movement through space affects life on Earth
Explanation:
Hope this helps: )
Cells, tissue, organs, organ systems, organism.
Answer:
B. Multiple keystone species are important to ecological stability
Explanation:
The first vertebrates appeared in the Paleozoic Era, specifically the Cambrian period. The vertebrates were <span>jawless fish with backbones made out of cartilages. It was thought that the first fishes evolved during this period. The correct answer to this question is letter "A. Cambrian". I hope this helps.</span>
The elements that it’s made up of
