The Archaea generally lack which of the following that are normally found in Gram-negative bacteria?
A. A complex peptidoglycan network
B. Outer membrane
C. Lipopolysaccharide
D. All of the choices are correct.
Answer: D
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The cold adaptation of the octopus nervous system ____
a. is a feature of all octopus species b. is caused by Na+ ion flow out of the neurons c. relies on the temperature sensitivity of K+ channels in neurons d. is caused by K+ ion flow into the neurons e. relies on the temperature sensitivity of Na+ channels in neurons
What is the risk associated with amateur mushroom hunting?
a. mycotoxicosis b. ringworm c. mycetismus d. histoplasmosis
DNA ligase links two ____ DNA fragments by ____ bonds
a. complementary; hydrogen b. circular; covalent c. palindromic; covalent d. linear; covalent e. linear; hydrogen
The special senses include all of the following, except
A) Sight. B) Olfaction. C) Tissue damage. D) Gustation. E) Equilibrium.