Which of the following skin defenses and its mechanism is mismatched?
A. Lysozyme; hydrolyzes peptidoglycan in bacterial cell walls
B. Keratinized surface; protein that provides waterproofing
C. Antimicrobial peptides; disrupt positively charged bacterial membranes
D. Sebum; lipid hydrolysis leads to toxic by-products that inhibit microbial growth
Answer: C
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Crabs and terrapins have a _____ impact on snail populations while snails have a _____ impact on
cordgrass populations and terrapins have a _____ impact on cordgrass populations.
a. negative; negative; negative b. negative; negative; positive c. negative; positive; negative d. positive; negative; positive e. positive; positive; positive
A chromosome’s gene sequence that was ABCDEFG
before modification and ABCDLMNOP afterward is an example of a. inversion. b. deletion. c. duplication. d. translocation. e. aneuploidy.
The plant physiologist F. C. Steward demonstrated that:a
the preprophase band is important in plant cell division. b. orchids can be generated from pollen grains. c. an entire plant can be generated from a single callus cell. d. the monopteros gene codes for a transcription factor. e. the shoot apical meristem gives rise to leaf and bud primordia.
Which step in making beer involves soaking malt grain, grinding it, and heating with sugar and starch?
A. Wort boiled with hops B. Malting C. Preparing a mash D. Fermentation E. Aging