The gizzard is to a bird as the ________ is/are to a mammal.
A. teeth
B. liver
C. cecum
D. pancreas
E. stomach
Answer: A
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Neural transmission across a mammalian synapse is accomplished by _____
A) the movement of sodium and potassium ions from the presynaptic neuron into the postsynaptic neuron B) impulses traveling as electrical currents across the synapse C) impulses causing the release of a chemical signal and its diffusion across the synapse D) impulses ricocheting back and forth across the synapse E) the movement of calcium ions from the presynaptic into the postsynaptic neuron
A bacterium running low on NADPH could ________ to generate more of this coenzyme
A) degrade an amino acid or nucleic acid B) invoke the pentose phosphate pathway C) degrade a fatty acid D) use a broad specificity phosphatase with inorganic phosphatase and NADH
Assuming independent assortment for all gene pairs, what is the probability that the following parents, AABbCc × AaBbCc, will produce an AaBbCc offspring?
A) 1/2 B) 1/16 C) 1/8 D) 3/4
Which of the following processes contributes least to genetic diversity?
A) crossing over B) duplication of DNA C) independent assortment of chromosomes at the metaphase plate D) combining of gametes from two different individuals