Answer:i think its b im not sure dont do b wait till someone else sees it
Explanation:
Answer:
c. DNA binding to histones enables overall positive supercoiling without enzymes that underwind the DNA helix.
Explanation:
The stomach is protected from the hydrochloric acid by
epithelial cells, which secrete a bicarbonate substance that covers the mucosa.
Since the bicarbonate solution is alkaline, it neutralizes the hydrochloric
acid produced by parietal cells and subsequently results in formation of water.
Importantly, the consistent secretion of the bicarbonate solution is what
protects the stomach from the strong acidic environment.
The correct answer is <span>D. circulatory, respiratory, nervous, endocrine
The other systems mentioned in the first three examples don't maintain oxygen levels at that body strain level.</span>
