What is the main consideration in determining a trophic level?

A) feeding level
B) production level
C) community level
D) energy loss level
E) efficiency level


Answer: A

Biology & Microbiology

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Lysogenized cells

A. are immune to any further infection by any virus. B. are immune to infection by the same virus. C. may have new properties. D. respond to infection with the SOS response. E. are immune to infection by the same virus AND may have new properties.

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What was the major stumbling block for the acceptance of natural selection as a mechanism for

evolution when proposed by Darwin?

a. strong evidence for inheritance of acquired traits b. lack of a fossil record c. lack of a plausible theory of heredity d. lack of evidence for artificial selection e. lack of observational and experimental data

Biology & Microbiology

Birds and mammals are considered polyphyletic when considering that

a. birds have wings and mammals do not. b. birds have feathers and mammals do not. c. birds and mammals do not share the same common reptilian ancestor. d. birds and mammals cannot interbreed. e. molecular clock data indicates birds and mammals diverged at the same time.

Biology & Microbiology

A pea plant with (Tt) as its genotype should be referred to as

a) the wild type. b) homozygous dominant. c) heterozygous. d) homozygous recessive. e) mutant.

Biology & Microbiology