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

Biology & Microbiology

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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.

Biology & Microbiology

The bacterial genera that produces pigments which protect plant leaves from UV irradiation is ________.

A. Nocardia B. Sphingomonas C. Arthrobacter D. Cellulomonas

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology