It would be a pain to write all out all the details, so this might help. There isn't that much reading involved. http://lsa.colorado.edu/essence/texts/lungs.html
Answer is option A.
A protein deficiency causes such diverse symptoms because immune, nervous, and muscle system cells require proteins for structure and regulation.
Proteins are the building blocks of bones, muscles, cartilage, skin, and blood. They also help in transporting oxygen, helps in blood clotting during injuries etc.
Answer:
Parathyroid hormone
Explanation:
This is one of the most essential hormones in your entire body.
Answer:
A Pelvis
Explanation:
The fact that whales have a pelvis even though one is not required for marine life helps confirm that whales were descendants of land mammals. I hope this helps!