The null model for population genetics is:
a. Newton's first law.
b. competitive exclusion model.
c. cell theory.
d. endosymbiosis theory.
e. Hardy–Weinberg model.
E
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During stressful times, the adrenal glands increase their secretion of _____
a. iodine c. cortisol b. antidiuretic hormone d. secretin
Which statement best describes the difference between therapeutic and reproductive cloning?
A) Therapeutic cloning involves producing medications, whereas reproductive cloning is used for in vitro fertilization procedures. B) Therapeutic cloning produces cells that are not genetically identical to their source, whereas reproductive cloning produces cells that are genetically identical to their source. C) Therapeutic cloning is used to produce stem cells that can be coerced into differentiating into a specific cell type, whereas reproductive cloning is used to produce organisms identical to what they were cloned from. D) There really aren't any differences between therapeutic and reproductive cloning.
Which one of the following statements CORRECTLY describes how DNA is replicated?
A) Each strand of the original DNA is first completely separated from the other. B) Replication of DNA occurs at multiple locations on the two original strands as the DNA is unzipped. C) Replication of DNA can begin anywhere along the length of the strands. D) The two original strands are first broken down to release nucleotides for the synthesis of new DNA. E) One of the original strands of DNA serves as a template for new DNA; the other strand is broken down to release nucleotides for the synthesis of new DNA.
According to the central dogma, the process by which information in an RNA molecule is used to direct the synthesis of a polypeptide is called
A) transduction. B) translation. C) transcription. D) transition. E) transversion.