Which of the following is the most likely explanation for a particular human population with a higher incidence of polydactyly (extra fingers/toes) than the human population as a whole?

A) directional selection
B) disruptive selection
C) founder effect
D) bottleneck effect


C

Biology & Microbiology

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Which of the following does not occur during RNA processing?

A. the addition of a nucleotide cap to the 5' end of the newly transcribed RNA B. the addition of a poly(A) tail to the 3' end of the newly transcribed RNA C. the removal of all exons during RNA splicing D. the removal of all introns during RNA splicing E. the degradation of excised RNA

Biology & Microbiology

Plants as well as brown, green, and red algae show a basic life cycle which involves the alternation of generations between a(n) 

A. spore and pollen. B. megaspore and a microspore. C. seed and a cone. D. sporophyte and a gametophyte. E. egg and a sperm.

Biology & Microbiology

Augustus Waller invented a machine that measures

a. blood pressure when the ventricles are contracting. b. blood pressure when the ventricles are relaxed. c. cardiac output. d. electrical activity of the brain. e. electrical activity of the heart.

Biology & Microbiology

If decomposers ceased to exist, you would expect 

A. photosynthesis to stop. B. organic matter to build up. C. few changes. D. increased numbers of herbivores.

Biology & Microbiology