<span>The organs that participate in vitamin D synthesis and activation are kidneys and liver.
</span>Vitamin D<span> is carried in the bloodstream to the </span>liver, where it is converted into the prohormone calcifediol.<span>Calcifediol is further hydroxylated by the kidneys to form </span>calcitriol and c<span>alcitriol circulates as a hormone in the blood, and regulates the concentration of </span>calcium<span> and </span>phosphate.
the food must be broken down by use of enzymes,during the process of respiration.
I believe it would be the last one since it is from the national institutes of heath, and that it the most reliable source.
Answer:
mutation, recombination, and immigration of genes.
Explanation: I think this is it if not please tell me and can I have brailiest
