Which of the following phenomena favors individuals with average phenotypes over those with extreme phenotypes?
A) Gene flow
B) Genetic drift
C) Sexual selection
D) Stabilizing selection
E) Coevolution
D
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Which of the following is formed on the lagging strand during DNA synthesis?
A) DNA secondary structures B) Okazaki fragments C) RNA polymerase D) replisomes
The synaptic cleft is
A. a deep furrow in a postsynaptic cell where signals are received. B. specialized channels in the presynaptic membrane that allow the passage of ions. C. the narrow extracellular space between the presynaptic and postsynaptic neurons at the synapse. D. recesses in the postsynaptic neuron membrane where neurotransmitters bind. E. the area of neuronal membrane between the dendrites and the axon hillock.
Which type of mutation will have an extra base inserted into the gene?
a. Deletion b. Insertion c. Base-pair substitution d. Translocation e. Elimination
Which of the following hormones is exclusively
female? a. follicle-stimulating hormone b. luteinizing hormone c. progesterone d. follicle-stimulating hormone and progesterone e. follicle-stimulating hormone, progesterone, and luteinizing hormone