The place(s) in the human ear where sound waves
are amplified by means of the vibrations of tiny
bones is
a. the pinna.
b. the auditory canal.
c. the middle ear.
d. the organ of Corti.
e. all of these.
Answer: c
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What can animals do to maintain an energy balance when food supplies become scarce in winter?
A. All of these answer options are correct. B. hibernate to reduce energy expenditure and conserve energy reserves C. migrate to areas with more abundant food supplies D. migrate to warmer areas E. build up enough of a positive energy balance during summer and fall to sustain them through the winter
Ammonia is converted to the much less toxic substance
a. acetic acid. b. phosphoric acid. c. amino acids. d. carbon dioxide. e. urea.
What is the main reason that sex-linked disorders are most often observed in males?
A.) The X chromosome only has genes for genetic disorders. B.) The Y chromosome cannot have genes that cause genetic disorders. C.) The Y chromosome cannot mask alleles on the X chromosome. D.) The X chromosome has genes only for sex determination.
Which of the following is a symptom of disease?
A. fever B. swelling C. diarrhea D. dizziness E. rash