<span>Alanine is one of the simplest amino acids in terms of molecular structure and one of the most widely found in protein. In humans, the L-isomer, which is the only form that is involved in protein synthesis, is one of the 20 standard amino acids required for normal functioning. Alanine is classified as a nonpolar amino acid.</span>
Answer:
The answer is D. Birds and crocodiles
Explanation:
They both share the same point which is their characteristic
Answer:
its the brain of the cell
Explanation:
An observation may generate a scientific question, which may lead to a hypothesis. The hypothesis can be tested the experimentation. The results of experimentation lead to changes in scientific knowledge.
<span>The brain stem is closest to the spinal cord.</span>