The basilar membrane makes up the floor of the ____
a. middle ear
b. semicircular canals
c. cochlear duct
d. scala tympani
e. scala vestibuli
ANSWER: c
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If the age-specific fertility rate is such that 100 females of age class x would produce 50 offspring, what is the contribution of age class x to the overall population growth rate?
A. 0.75 B. 0.5 C. 2 D. 50 E. cannot be calculated with this information.
Land dwelling insects do not have the ability to excrete ammonia so instead they will convert it into ________
a. urea b. urine c. plasma d. water e. uric acid
. “Seasonal,” “daily,” and “monthly” all describe what
type of reproductive isolating mechanism? a. behavioral b. temporal c. mechanical d. gamete e. ecological
What is the risk that someone in the United States will die of cancer?
A. 1 in 50 B. 1 in 5 C. 1 in 7 D. 1 in 3