One key reason why viruses are not considered living organisms is
A. viruses do not contain genetic information.
B. viruses do not reproduce on their own.
C. viruses are all smaller than the smallest known cells.
D. viruses do not contain a nucleus.
E. viruses can be frozen and still survive.
Answer: B. viruses do not reproduce on their own.
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Which of the following is true of the integration of a viral genome into the host chromosome?
A. Integration begins the process of host chromosome degradation. B. Integration of the viral genome is a form of site-specific recombination. C. The enzymes that are used in integration are nonspecific for the virus and its host. D. All of the choices are correct.
A distinctive feature of eukaryotes is the organization of tightly packaged chromosomal DNA with proteins into a membrane-bound structure called a:
A. nucleus. B. cell. C. plasma membrane. D. nucleolus.
Which structure releases aldosterone?
Select one: a. glomerular (Bowman's) capsule b. proximal convoluted tubule cells c. loop of the nephron (loop of Henle) d. collecting tubule e. adrenal cortex
Plasmogamy, karyogamy, and meiosis are stages of the fungal sexual life cycle
Indicate whether the statement is true or false