Answer:
C) DNA or RNA
Explanation:
Genetic material is found in both viruses and in living single-celled organisms, such as protozoans and bacteria.
I believe that the answer is D. If something has evolved, it can not interbreed with its old species. I think this is right!
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Unlike the hippo's ancestor, whale ancestors moved to the sea and evolved into swimming creatures over a period of about 8 million years. Fossils of gigantic ancient whales called Basilosaurus were first mistaken for dinasaur fossils but were later recognised as mammals.
Answer:
The return of blood to the heart is assisted by the action of the skeletal- muscle pump. As muscles move, they squeeze the veins running through them. Veins contain a series of one-way valves, and they are squeezed, blood is pushed through the valves, which then close to prevent backflow.
Stratum corneum is the answer
