Which of the following is not a hypothesized advantage of sexual reproduction?
A. It helps remove deleterious genes.
B. It reduces the chances of producing offspring less fit than the parent.
C. It recombines different advantageous alleles and separates them from harmful ones.
D. It creates novel combinations of genes.
E. It increases resistance to parasites.
Ans: B. It reduces the chances of producing offspring less fit than the parent.
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In mammals, the filtrate leaves the blood by exiting from the ____
a. efferent arteriole b. peritubular capillaries c. renal artery d. afferent arteriole e. glomerulus
The Pill
a. reduces menstrual cramps. b. can cause serious cardiovascular disorders especially in smokers. c. increases the risk of breast, cervical, and liver cancers. d. is the most common fertility control method in the United States. e. includes all of these.
Auditory receptors are located in the
a. cochlea. b. semicircular canals. c. utricle. d. ampullae. e. otoliths.
In gel electrophoresis, DNA molecules move toward the ________ electrode because they have an overall ________ charge.
A. negative; negative B. positive; positive C. negative; positive D. positive; negative E. negative and positive; neutral