Which of the following is true about a merozygote?
A) A merozygote can form if an F factor carries chromosomal DNA and is injected into an F? cell.
B) Merozygotes were crucial to our understanding of the formation of the sex pilus.
C) A conjugation with an Hfr donor will never produce a merozygote.
D) It can spontaneously form from an Hfr cell.
E) It is formed from an Hfr to F+ cross.
Answer: A
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Which of the following is a small Gram-negative rod requiring X-factor for growth?
A. Escherichia coli. B. Treponema pallidum. C. Neisseria gonorrheae. D. Haemophilus ducreyi
After the blood leaves the glomerular capillaries, it goes via the efferent arterioles to the
a. renal vein. b. renal artery. c. peritubular capillaries. d. vena cava. e. heart.
As a child grows, the lungs increase in size as well. Hypothesize what the pressure of the gases within the lungs would be if the lung volume of an individual goes from 3000ml to 4000ml.
A. gas pressure would decrease B. gas pressure would increase C. gas pressure would be unchanged
Totipotent nuclei are capable of:
a. controlling the expression of other genes in the nucleus. b. directing normal development of an organism. c. causing cells to lose the ability to differentiate. d. undergoing unlimited nuclear divisions. e. stopping the cell cycle at will.