Even if utilized properly, what is the least effective means of birth control?
A. oral contraceptive
B. condom
C. foam
D. IUD
E. implant
C. foam
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Most of the organic sulfur is located in
A. fatty acids and lipids. B. monosaccharides and carbohydrates. C. amino acids and proteins. D. nucleotides and nucleic acids.
The bacterial genera that produces pigments which protect plant leaves from UV irradiation is ________.
A. Nocardia B. Sphingomonas C. Arthrobacter D. Cellulomonas
What phenomena tends to increase genetic variation in a population?
A. Gene flow B. Population bottleneck C. Assortative mating D. Genetic drift E. Founder effect
Populations ____
a. are only limited by one factor at a time b. increase arithmetically c. may increase indefinitely d. are limited by the carrying capacity e. overcome limiting factors by increasing their biotic potential