Which of the classes of hormones triggers the synthesis of new intracellular proteins within the target cell?
a. peptides.
b. catecholamines.
c. steroids.
d. thyroid hormone.
e. both steroids and thyroid hormone are correct.
E
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Formation of the germ layer is the process of
A) somite formation. B) blastolation. C) meiosis. D) gastrulation. E) None of the answers are correct.
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The lymphatic system consists of lymphatic vessels, lymphatic tissue, lymph nodes, and lymphoid organs such as ________
A) thyroid, and thymus B) pancreas, and spleen C) oropharynx, and tonsils D) spleen, and thymus