For the answer to the question above, I think the answer is simply because <span>four legs characteristic is not special to mammals but the hair that is something more important and special characteristic of the mammals, that's why. I hope this helps
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Its Osteoporosis, also known as porous bones. Which is characterized by weak brittle bones and low bone mass. Both men and women are affected by this disease.
Phytoplankton
They are the only one that are both animals and protists as they can be either
Explanation:
respiration because it's about blood circulation
The most abundant protein is dead epidermal structures such as hair and melanin.
