The synthesis and secretion of ____ is ultimately regulated by gonadotropin-releasing hormone from the ____
a. estrogen; posterior pituitary
b. estrogen; ovaries
c. testosterone; hypothalamus
d. testosterone; testes
e. androgens; gonads
ANSWER: c
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The variable region of an antibody occurs
A. only on the heavy chains. B. only on the light chains. C. on one of the light chains. D. on all four chains.
If an organism is isolated that has no nuclear membrane and the DNA is condensed into a body in the cytoplasm, this organism would most likely be classified as
A) a prokaryote. B) a eukaryote. C) a pathogen. D) either a eukaryote or prokaryote.
During a murder investigation in your hometown, the crime scene investigation unit has discovered blowfly maggots developing on the body
As an amateur detective, you arrive on the scene just in time to explain to the investigators how the flies are serving as decomposers and carnivores at the same time. How is this possible?
Which of the following mechanisms helps keep the stomach lining in place despite the destructive force of gastric juice?
A) digestion of protein by pepsin B) secretion of acid-neutralizing compounds C) generation through mitosis of new cells to replace the stomach lining D) protection of the cells of the stomach-lining by parietal cells