Mutation frequency is the
A) number of mutations per gene per generation.
B) number of mutations per nucleotide per generation.
C) number of mutations per cell per generation.
D) number of a specific mutation in a defined population.
E) total number of mutations in a defined population.
D
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The pleasurable feeling one gets from taking
Ecstacy is related to the neurotransmitter
a. endorphin. b. acetlycholine. c. dopamine. d. serotonin. e. epinephrine.
The most accurate description of an organism with
genotype AaBb is a. homozygous dominant. b. heterozygous. c. heterozygous dominant. d. homozygous recessive. e. heterozygous recessive.
Homo erectus:a
was shorter than Homo habilis. b. had a larger brain than Homo habilis. c. had more pronounced sexual dimorphism than Homo habilis. d. was the first member of the genus Homo without pronounced supraorbital ridges. e. did not use tools.
Parietal cells secrete pepsinogen. Indicate whether the statement is true or false