Answer: because mammals have more complex biological structures; limb regeneration would require sophisticated controls to ensure that limbs and organs don’t grow out of control.
Explanation:
First, we can eliminate 2 options. The simple unit of protein is amino acid, instead, the simple unit of fat and lipids are fatty acids and glycerol, therfore we can eliminate option A and D because fatty acids does not exist in protein.
Now we are left with B and C. To solve that, we need to understand that protein is made of a chain of amino acids, a lot of amino acids are chemically combined and cannot be broken down unless the use of enzymes. Amino acid are actually the monomers that forms protein.
Therefore, the answer is C. amino acid combine to form a protein chain.
Answer:
A The book on the table
Explanation: It is at rest which mean its in equilibrium
