In order to successfully and safely deliver a gene to a human cell, a virus vector must be
A) both infectious and pathogenic.
B) packaged with RNA rather than DNA.
C) pathogenic but not infectious.
D) infectious but not pathogenic.
E) a retrovirus.
Answer: D
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Why might increased soil fertility result in lower species diversity?
A) There is no relationship between soil fertility and species diversity. B) Increased nutrients help more rare plants survive. C) Dominant species are better able to outcompete other species. D) Dominant species are less able to outcompete other species.
The molecule lignin is associated with which property of a cell wall?
A. water resistance B. flexibility C. ability to hold cells together D. All of the above are correct.
Explain how observing artificial selection provides an inference for natural selection
What will be an ideal response?