The dissolved oxygen content in water
The greatest surface area for gas exchange is found in the Alveoli
Answer:
I think the correct answer is option ( A )
Explanation:
I'm not sure
<h2><u>Question</u><u>:</u><u>-</u></h2>
<u>What's</u><u> the</u><u> </u><u>function</u><u> of</u><u> </u><u>RER </u>?
<h2><u>Answer</u><u>:</u><u>-</u></h2>
- RER helps in the formation of proteins in the cell. The presence of ribosomes is actually responsible for the synthesis of the proteins by the RER.
2. RER help in transport of protein which are synthesised by ribosomes on their surface.

–TheExtraterrestrial
Niacin is another name for nicotinic acid. It is an organic compound that is synthesized in the liver. The essential amino acid that is utilized to synthesize niacin is tryptophan. To make 1 mg of niacin, your body needs 60mg of tryptophan. The biosynthesis of niacin requires riboflavin as well and vitamin B6.
The answer is D.