The fusion of two gametes produces a
A) zygote.
B) schizont.
C) chromatid.
D) centromere.
E) merozoite.
A
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Which one of the following statements about the methylation state of CpG islands is incorrect?
A. Cells can heavily methylate CpG islands of viral DNA sequences in order to restrict their expression. B. Cancer cells often methylate CpG islands in genes that could restrict cell growth. C. The methylation state of CpG islands provides a way to turn genes on or off. D. The methylation state of CpG islands is rigid and will not change over time. E. The methylation state of CpG islands can change in response to the environment.
Which of the following is not an example of euploidy?
A. Tetraploid B. Polyploid C. Triploid D. Diploid E. Aneuploid
Wolbachia are found only in
A. hot springs. B. plants. C. mammals. D. arthropods.
The endocrine system differs from the nervous system in that the endocrine system can
A. cause changes in behavior. B. cause changes in growth. C. only cause long-term changes in the functioning of an organism. D. stimulate the nervous system, but the nervous system cannot stimulate the endocrine system.