The evolutionary process by which new species arise is called ________

a. gene flow
b. genetic drift
c. speciation
d. natural selection
e. directional selection


c

Biology & Microbiology

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Gene therapy

a. has not yet been used successfully with mammals. b. is a surgical technique that replaces defective genes with normal genes. c. has been used successfully to treat victims of autosomal dominant disorders by replacing the dominant allele with a recessive allele. d. is a genetic engineering technique that replaces defective alleles with normal ones. e. is none of these.

Biology & Microbiology

Which of the following is a function of the thymus?

a) production of red blood cells b) secretion of antibodies c) production and maintenance of stem cells d) site for the maturation of lymphocytes

Biology & Microbiology

What does water potential refer to?

a. a relative value that is defined in reference to distilled water at atmospheric pressure of 10 MPa b. a relative value that is defined in reference to pure water at atmospheric pressure of 10 MPa c. a relative value that is defined in reference to pure water at atmospheric pressure of 0 MPa d. a relative value that is defined in reference to distilled water at atmospheric pressure of 0 MPa

Biology & Microbiology

Change in the allele frequency due to chance alone is known as

A. inbreeding. B. genetic drift. C. founder effect. D. bottlenecks. E. gene flow.

Biology & Microbiology