The Ames test ________.
A. is used to measure levels of oxygen-free radicals
B. can be used to measure the mutagenicity of chemicals
C. is used to measure the repair of thymine dimers
D. None of the choices are correct.
Answer: B
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Describe the approach using genomics to identify genes that contribute to the variations in cognitive ability observed in humans
What will be an ideal response?
The vessels in which you would find the
highest concentration of plasma proteins are the
a. venules. b. arterioles. c. capillaries. d. veins. e. arteries
Seventy to 90 percent of the genetic material in a gamete made in your body could be inherited from your mother. How could this be?
a. The above statement is incorrect. Fifty percent of the genetic material in your gametes comes from your father. b. You receive maternal genes through the placenta and through breast milk. c. The X chromosome is substantially larger than the Y chromosome. d. Your maternal genes kill off your paternal genes at a greater rate than your paternal genes kill off your maternal genes. e. You receive many mitochondria, which have their own genome, from your mother, but not from your father.
What three factors determine the ecological efficiencies of consumers?
a. assimilation and harvesting efficiencies, and nutrient volume b. assimilation and harvesting efficiencies, and water volume c. production, harvesting, and assimilation efficiencies d. production and harvesting efficiencies, and amount of sunlight e. production and harvesting efficiencies, and percentage of decomposers