In general, control groups should be ________
a. older than the experimental group
b. more fit than the experimental group
c. more diverse than the experimental group
d. as similar as possible to the experimental group
d
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As the concentration of a specific biochemical in a sample increases, the intensity measurement for that biochemical decreases
a. True b. False
The CAM pathway
a. involves only the Calvin-Benson cycle b. involves only the C4 cycle c. is used by plants in humid regions d. is also known as photorespiration e. needs day and night for completion
What does it mean for an allele to become fixed, and what does it imply?
A. The frequency of the fixed allele has become 0% because it was detrimental. B. The frequency of the fixed allele has become 0% and is no longer present. C. The frequency of the fixed allele has become 100% because it is beneficial. D. The frequency of the fixed allele has become 100% and other alleles are lost.
Why does semen contain alkaline secretions?
A. The pH of semen has no significance. B. The female vagina is acidic and thus not a favorable environment for sperm. C. Alkaline secretions are less viscous and the sperm can swim better. D. Sperm are only able to use fructose under alkaline conditions.