Some human diseases are more abundant in small populations due to genetic drift.
a. true
b. false
Ans: a. true
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Ultraviolet radiation at the bactericidal wavelength destroy bacteria by
A. destroying endospores. B. damaging nucleic acid. C. preventing spore formation. D. denaturing proteins.
Which is a likely result of a mass extinction?
a. create “empty niche space” that can stimulate radiation of surviving groups b. eliminate non-beneficial alleles from gene pools c. increase the rate of new mutations d. decrease the rate of new mutations e. cause mutations that have greater than usual effect
A group of 3 nucleotides acts as a "code word" or template for making
1 amino acid. 2 amino acids. 3 amino acids. 4 amino acids. none of the answer choices are correct.
The posterior portion of the neural tube will develop into the frog's
A) spinal cord. B) brain. C) blastocoel. D) digestive tract. E) anus.