A fruit fly population has a gene with two alleles, A1 and A2. Tests show that 70% of the gametes produced in the population contain the A1 allele. If the population is in Hardy-Weinberg equilibrium, what proportion of the flies carry both A1 and A2?
a. 0.42
b. 0.7
c. 0.49
d. 0.21
e. 0.09
Answer: a. 0.42
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A. Elevated plant growth, but no change in insect herbivory. B. No change in plant growth, but elevated insect herbivory. C. Elevated plant growth, but reduced insect herbivory. D. Elevated plant growth and insect herbivory. E. No change in plant growth, but increased insect herbivory.
The muscular tube leading from the pharynx to the stomach is the
A. larynx. B. trachea. C. esophagus. D. glottis. E. bronchus.
What type of floral attraction would work best on the pollinator in the accompanying figure?
a. white flowers b. purple or blue flowers c. a strong sweet scent d. a strong carrion-like scent e. sweet nectar
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A) is slower than adaptive immunity in responding to pathogens. B) is nonspecific and present at birth. C) involves a memory component. D) involves T cells and B cells. E) provides increased susceptibility to disease.