A(n) _____disease is an infectious disease that does not arise from host to host transmission
Fill in the blank(s) with the appropriate word(s).
noncommunicable
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Which statement about the structure of RNA is true?
a. RNA is a double-stranded helix. b. RNA nucleotides contain cytosine and guanine. c. RNA nucleotides contain thymine and adenine. d. Deoxyribose is the five-carbon sugar in RNA.
Which of the following predictions could you make about a cell in which the HP1 protein was disabled?
A) Methylation of DNA would increase. B) All of the cell's chromosomes would be completely condensed into heterochromatin. C) Histone methyltransferase would bind to chromatin more easily. D) Heterochromatin would not be formed.
The fossil record is incomplete because
a. very few organisms were preserved as fossils. b. organisms tend to decay before becoming a fossil. c. animals with hard parts are preserved more easily. d. geologic processes may destroy fossils. e. all of these are true.
A bacterial cell undergoes binary fission. One of the daughter cells is normal, but the other has a mutation in the FtsZ protein, rendering the protein nonfunctional. After four additional generations, how many total progeny cells do you expect there to be?
A. 5 B. 17 C. 16 D. 32 E. 33