You wanted to test a single fruit fly for the presence of the TOLL protein , so you prick it with a needle coated in fungal spores. The fly dies 2 days later. Which of the following statements is TRUE?
A. The TOLL protein is only found in humans.
B. This is evidence that the TOLL protein is not present.
C. This is evidence that the TOLL protein is present.
D. This is inconclusive evidence.
Answer: D
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A. Hybridization between neighboring populations B. Gametes dispersed by ocean currents C. Disassortative mating within a population D. Wind-blown pollen E. Zygotes dispersed by ocean currents
If it is true that potato plants use uncoupling proteins (UCPs) in a similar way as mammals, one would
expect the following in these plants:
a. increased amounts of ATP production. b. decreased sugar metabolism. c. increased internal tissue temperature. d. decreased mitochondrial catabolism. e. increased cytosolic pH.
In a highly basic solution, pH = 13, the dominant form of glycine is:
A) NH2—CH2—COOH. B) NH2—CH2—COO?. C) NH2—CH3+—COO?. D) NH3+—CH2—COOH. E) NH3+—CH2—COO?.
What do we call a lymphocyte that has never encountered an antigen?
A. Stem leukocyte B. Foreign lymphocyte C. T cell D. B cell E. Naive lymphocyte