Sulfate-reducing bacteria produce
a. sulfite.
b. calcium sulfate.
c. hydrogen sulfide.
d. iron pyrite.
Answer: C
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Which of the following is the proper sequence for mitosis?
I. metaphase II. telophase III. prophase IV. anaphase a. I, III, IV, II b. I, II, III, IV c. III, I, IV, II d. IV, I, III, II e. III, IV, I, II
Which of the following is FALSE about
Marfan syndrome? a. It results from an autosomal dominant mutation. b. The affected gene produces a defective form of the protein fibrillin. c. Connective tissues are weakened. d. It affects one in ten thousand men and women. e. None of these is false.
The efficient exchange of gases in gills is an example of countercurrent exchange
____________________ Indicate whether the statement is true or false.
Which of the following statements about a gram-positive cell wall is false?
A) It maintains the shape of the cell. B) It is sensitive to lysozyme. C) It protects the cell in a hypertonic environment. D) It contains teichoic acids. E) It is sensitive to penicillin.