Which of the following contains all of the others?

A) biosphere
B) community
C) ecosystem
D) population


Answer: A) biosphere

Biology & Microbiology

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A riboswitch mechanism is known to regulate the transcription of genes involved in:

A. lactose metabolism. B. vitamin B1 synthesis. C. tryptophan biosynthesis. D. arabinose metabolism.

Biology & Microbiology

In a Hardy-Weinberg population with two alleles, A and a, that are in equilibrium, the frequency of allele a is 0.2. What is the percentage of the population that is heterozygous for this allele?

a. 0.02 b. 2.0 c. 4.0 d. 16.0 e. 32.0

Biology & Microbiology

Altruism is

A. actions of an animal that immediately benefit others rather than itself. B. a means of ranking animals in a dominance hierarchy. C. displaced aggressive behavior. D. belligerent behavior that helps an animal compete in its society.

Biology & Microbiology

Races of humans are unlikely to evolve extensive differences in the future for which of the following reasons?

I. The environment is unlikely to change. II. Human evolution is complete. III. The human races are incompletely isolated. A) I only B) III only C) I and II only D) II and III only E) I, II, and III

Biology & Microbiology