According to the figure, the most effective wavelength for photosynthesis is revealed by algae exposed to ____
nanometers.
a. 680
b. 700
c. 400
d. 425
e. 550
ANSWER: d
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Which of the following would lead to an increase in testosterone production by Leydig cells?
A. an increase of GnRH production B. a decrease in LH production C. an increase in FSH production D. use of synthetic anabolic steroids E. None of the answer options would lead to an increase in testosterone.
In the absence of O2, the partial metabolism of glucose in human muscles produces _________
a. acetaldehyde b. carbon dioxide c. energy d. lactic acid e. oxygen
The continuous release of mucus by the epithelial cells lining the respiratory tract is an example of
A) regulated secretion. B) constitutive secretion. C) the mucus response. D) clathrin-coated pit formation. E) phagocytosis.
The first plants to produce seeds evolved during which time period?
a. Mesozoic era b. Cenozoic era c. Jurassic period d. Devonian period e. Cretaceous period