Triiodothyronine (T3) is secreted by
a. pancreatic islet cells.
b. the thyroid gland.
c. the pituitary gland.
d. the adrenal medulla.
e. the adrenal cortex
B
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Which macromolecule has the highest diversity of functions?
A. carbohydrates B. proteins C. nucleic acids D. lipids E. glycolipids
The two main functions of the lymphatic system are
A) coagulating blood and fighting infections. B) producing hormones that regulate the immune system and coagulating blood. C) producing hormones that regulate the immune system and fighting infections. D) returning tissue fluid to the circulatory system and fighting infections.
A building block of nucleic acids, consisting of a five-carbon sugar covalently bonded to a nitrogenous base and one or more phosphate groups
What will be an ideal response?
Ferns produce their spores through meiosis.
Indicate whether the statement is true or false.