Evolutionary change can occur when the frequency of alleles in a population changes. Which of the following describes a change in the allele frequency of a population due to chance?

A) founder effect
B) bottleneck effect
C) genetic drift
D) gene flow


Ans: C) genetic drift

Biology & Microbiology

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Which of the following groups of animals is found in the same environment, and has similar heat storage adaptations, as cheetahs?

A. Gazelles B. Rhinos C. Giraffes D. Elephants E. Hyenas

Biology & Microbiology

All of the following are true for soil with a low pH except:a

aluminum is more soluble. b. calcium phosphate becomes less soluble. c. acidic soil can be found in Pygmy forest in California. d. potassium is leached more readily from the soil. e. manganese may be available in toxic concentrations

Biology & Microbiology

The portion of the bone labeled B in the accompanying is called the:



a. periosteum
b. diaphysis.
c. epiphysis.
d. osteon.
e. metaphysis

Biology & Microbiology

A "mini-gene" has the base sequence TACCCGTGCACG. Which of the following sequences represents a single base substitution?

A) TACCCGGCACG B) TACCCGTGCACG C) TACCCGAGCACG D) TACCGTGCTACG E) TACCCGTGTCACG

Biology & Microbiology