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.
Ans: C) It protects the cell in a hypertonic environment.
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Based on the colligative properties of water, what would happen if one were to add a solute to water?
A. The freezing point of water would decrease. B. The freezing point of water would increase. C. The boiling point of water would increase. D. Both the freezing point of water would decrease and the boiling point of water would increase. E. Nothing would change with respect to the freezing point or boiling point of water.
Which of the following traits is not characteristic of amphibians?
a. carnivorous as adults b. four-chambered heart c. needing water to breed d. evolved from lobe-finned fish
Refer to the accompanying table. What is the frequency of the dd genotype?
a. 0.1 b. 0.2 c. 0.4 d. 0.6 e. 1.2
Gametophytes produce eggs and sperms.
a. true b. false