Refer to the accompanying figure. Which of the labeled structures refers to the prostate gland?
a. 1
b. 3
c. 5
d. 7
e. 9
b
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Muscle cells differ from nerve cells mainly because they _____
A) express different genes B) contain different genes C) use different genetic codes D) have unique ribosomes E) have different chromosomes
Which of the following is not true about the G + C content percentages in DNA of organisms?
A. Similar G + C percentages only suggests relatedness if the two organisms are also alike phenotypically. B. Organisms with different G + C percentages have dissimilar base sequences. C. Organisms with similar G + C percentages have similar base sequences. D. All of the choices are correct.
Which of the following is an INCORRECT pairing?
A. viruses; acellular parasites B. fungi; cell walls C. protozoa; multicellular D. prokaryotes; no nuclei
Although there are many distinct prokaryotic species, most have a small range of shapes, sizes, and growth rates. Which of the following characteristics are not observed in prokaryotes?
(a) a highly structured cytoplasm (b) endoplasmic reticulum (c) the ability to divide rapidly (d) a cell wall