A trait that confers ________ in one environment might make an organism less able to survive and reproduce in another environment
A) selection
B) fitness
C) adaptation
D) alleles
B
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Which of the following provides the likeliest explanation for the differences seen in the human population?
A. presence of parasites in different areas B. amount of sunlight in different areas C. the altitude in different areas D. natural selection
Monica takes the drug Accutane throughout her pregnancy, and her child has mental retardation and heart problems, due to the exposure. Accutane is a(n)
A) gene. B) teratogen. C) pregnancy modifier. D) carcinogen.
How do plant and animal viruses differ in their mode of entry into host cells?
What will be an ideal response?
In gel electrophoresis, which of the following DNA fragments would travel the farthest distance from the sample well?
A) ATCCCGAT B) ATCCCG C) ATCC D) AT E) ATCCCGATTGCACGTT