Answer:
Front the atmosphere that's from environment
<span>s that a single on off switch can control the whole cluster of functionally related genes; these genes are coordinately controlled (ex: when Ecoli must make tryptophan for itself because the nutrient medium lacks this amino acid all the enzymes for the metabolic pathway are synthesized at one time)</span>
Answer:
b) Apical surface
Explanation:
Apical surface is the portion of an epithelial cell in the stomach that food wouold be in contact with.
