Transcription in prokaryotes is carried out by ________, which unwind(s) and transcribe(s) the gene.
A. transcription factors
B. RNA polymerase III
C. RNA polymerase II
D. RNA polymerase
E. RNA synthetase
Answer: D
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In mammals, which of the following substances is produced in a muscle that operates anaerobically?
(A) Citrate (B) NADPH (C) Lactate (D) Oxygen
In pea plants, purple flower is dominant to white flower color. If two pea plants that are true-breeding for white flowers are crossed, in the offspring
a) all of the flowers will be purple b) three-quarters of the flowers will be purple and one-quarter will be white c) half of the flowers will be purple and half will be white d) one-quarter of the flowers will be purple and three-quarters will be white e) all of the flowers will be white
Both extremes of an array of phenotypes are favored in
A. directional selection. B. disruptive selection. C. stabilizing selection. D. genetic drift. E. gene flow.
Phenotypic plasticity
What will be an ideal response?