Chromosomal aberrations can be produced by
exposure to
a. viruses.
b. radiation.
c. various chemicals.
d. viruses and radiation only.
e. viruses, radiation, and various chemicals
E
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When an environmental stimulus is received, the signal is usually transmitted through three types of nerves cells. In which order is the signal transmitted through these cells?
A. sensory neurons, motor neurons, interneurons B. motor neurons, sensory neurons, interneurons C. sensory neurons, interneurons, motor neurons D. interneurons, sensory neurons, motor neurons E. motor neurons, interneurons, sensory neurons
A ribosome consists of ____
a. two small subunits b. two large subunits c. three subunits of different size d. rRNA and ribosomal proteins e. tRNA and ribosomal proteins
The synthesis site for the hormones of this figure is indicated by the letter ____
a. A b. B c. C d. D e. E
Nitrous oxide
a. is a more potent greenhouse gas than carbon monoxide b. is released in the burning of fossil fuels c. destroys the ozone d. is found in synthetic fertilizers e. is all of the above