Which one of the following statements is TRUE regarding the G0 phase of the cell cycle?
A) G0 is an abnormal state, and cells in this stage have been damaged.
B) Neurons and osteocytes remain in G0 after adolescence.
C) Most cancer cells have entered the G0 phase.
D) Once in G0, a cell remains there.
E) Stems cells in the bone marrow are typically in the G0 phase.
B
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Ocean currents ____ in the Northern Hemisphere and ____ in the Southern Hemisphere
a. circulate counterclockwise; circulate clockwise b. move west to east; move east to west c. move east to west; move west to east d. circulate clockwise; circulate counterclockwise e. undulate along a line northeast and southwest; undulate along a line southeast to northwest
Which of the following are NOT members of cnidaria?
A. sea anemones B. corals C. hydrozoa D. sponges E. Portuguese man-of-war
Which of the following is NOT an antimicrobial feature of the urinary system?
A) physiological valves found in the ureter B) pH of the urine C) flushing action of urine D) the use of the urethra for seminal fluid in women E) None of the answers is correct; all of these are antimicrobial features of the urinary system.
DNA is composed of repeating units of sugars, phosphates, and nucleic acids. This is an example of a
A. polymer. B. monomer. C. salt. D. micelle. E. lipid.