Answer:
ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation
Altitude doesn't change uniformly because the four main layers of the atmosphere have different temperature gradients, creating the thermal structure of the atmosphere.
Answer:
down syndrome
Explanation:
people with down syndrome have an extra chromosome in the twenty-first pair
Polypeptide:
A chain of amino acids linked together by peptide bonds and having a molecular weight of up to about 10,000.
Dipeptide:
A peptide that yields two amino acids on hydrolysis.
