Which of the following is the deamination product of adenine?
A. uracil
B. xanthine
C. thymine
D. hypoxanthine
E. The deamination product is unknown.
D
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Helper T cells produce ____
a. cytokines b. antibodies c. plasma cells d. chemicals that cause apoptosis e. histamine
You are studying two populations of a certain species of frog in two ponds five kilometers apart. There are no other ponds in the area. In pond A all the frogs are small and have a few black spots on them. In pond B most of the frogs are large and lack spots but a few are small without spots and a few are large with spots. Because of the differences in these two populations
A. the distance between ponds is probably a barrier. B. there is probably little interbreeding between the two populations. C. the population in pond A could have gone through a genetic bottleneck. D. All of the choices could be correct.
Information gained by observation is
A. always accurate. B. empirical evidence. C. called a variable. D. the control.
How was it determined that X-rays are mutagenic?
What will be an ideal response?