Which of the following is the most unique aspect of archaeon cell envelopes?
A. Some archaeons have lipid monolayers in their plasma membrane.
B. Archaeon capsules can be composed of protein or polysaccharide.
C. The cell walls contain a modified type of peptidoglycan
D. The plasma membrane is composed of phospholipids
Answer: A
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Which of the following statements about action potentials is correct?
A) Action potentials for a given neuron vary in magnitude. B) Action potentials for a given neuron vary in duration. C) Action potentials are propagated down the length of the axon. D) Movement of ions during the action potential occurs mostly through the sodium pump.
Which statement is true of angiosperms?
a. All edible fruit are produced by eudicots. b. There are only two major groups of angiosperms. c. They all belong to the phylum Anthophyta. d. All angiosperms have a major tap root.
An organ is made up of
a. a single type of tissue. b. glandular tissue. c. 2 or more tissues working together to perform a specific task. d. muscle tissue that has differentiated from stem cells. e. none of these.
Four of the five answers listed below are effects of acid rain. Select the exception
a. attacks marble, metals, mortar, and nylons b. causes air inversion and pollution events c. makes toxic heavy metals more mobile d. has different effects in different watersheds e. produces sterile lakes