All the following are characteristics of vitamin d except
a. it is activated by the liver and kidney
b. it causes the kidney to excrete less calcium in the urine.
c. its synthesis is enhanced by use of sunscreen.
d. it facilitates calcium absorption from the small intestine

Aseries of connections of food chain in an ecosystem is called a what

If assuming tasting ptc as a simple gene trait, what other genotype would you select to put in this missing genotype box that could result in this phenotype

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing