Answer:Digestion works by moving food through the GI tract. Digestion begins in the mouth with chewing and ends in the small intestine. As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules.
Explanation:
Answer:
Two electrons are added to one sublevel at a time (Hund's Principle)
<span>Embryonic stem cells
Tissue-specific stem cells
Mesenchymal stem cells
<span>Induced pluripotent stem cells
</span></span>
Three-letter sets, or codons, of nucleic acids "code" for individual amino acids. Amino acids form proteins.