Which of the following are muscle cells that are active in vasoconstriction and vasodilation of blood vessels?
A. Skeletal muscle cells
B. Cardiac muscle cells
C. Endocardium
D. Smooth muscle
D
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The difference between somatic cell gene therapy and germline therapy is that
A. germline therapy is the temporary repair of a genetic mutation, whereas somatic cell therapy is a permanent fix. B. germline therapy overcomes a protein malfunction in specific tissues but is not repaired in the entire organism and cannot be passed on to offspring. C. somatic cell gene therapy is introduced into the egg, sperm or developing embryo, whereas germline therapy introduces a new gene into a mature tissue. D. somatic cell gene therapy overcomes a protein malfunction in specific tissues but is not repaired in the entire organism and cannot be passed on to offspring.
If the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is _____ years old
a. 15,000 b. 26,667 c. 30,000 d. 40,000
Who is referred to as the Father of
Biogeography?
a. Cuvier b. Lyell c. Lamarck d. Aristotle e. Wallace
What name is given to the alteration of an RNA sequence after transcription?
What will be an ideal response?