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

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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.

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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.

Biology & Microbiology