Which technique amplifies small samples of DNA to quantities that are large enough for analysis?
A. hybridization
B. PCR
C. RFLP
D. DNA fingerprinting
Ans: B. PCR
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You are excited because you just purchased a male guppy that has red, blue and green colors on its fins and tail. Your guppies at home do not have this combination of colors. You place the new male in with three females for mating purposes. After three weeks you have many new baby guppies and with the new color combination. This is an example of which type of selection?
A. Natural B. Environmental C. Analogous D. Convergent E. Artificial
In the respiratory tract, ciliated cells constantly sweep mucus that contains trapped foreign matter
a. True b. False
Organisms with more than two chromosome sets are said to be ________
A) multiploid B) polyploid C) diploid D) haploid E) None of the above.
All of the following statements about the brown algae are true except:a
this group includes the most complex algae that have blades, stipes, and holdfasts. b. they share a common ancestor with representatives of the plant kingdom. c. they represent the largest members of the algae called seaweeds. d. they are harvested for algin, which is used in a variety of commercial products. e. they are ecologically important as producers and in providing habitats along rocky coastlines.