The warming action on earth's atmosphere is

referred to as



a. respiration accumulation.
b. the greenhouse effect.
c. the smog problem.
d. the blanket phenomenon.
e. ozone depletion


B

Biology & Microbiology

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Which one of the following interactions is not a stabilizing force at the tertiary level of protein organization?

A. an ionic bond between a positively charged side chain and a negatively charged side chain B. hydrophobic clustering of non-polar side chains in the interior of a protein C. hydrogen bonding between a carbonyl oxygen of one peptide bond and an amide hydrogen of a nearby peptide bond D. disulfide linkages between cysteine residues E. van der Waals interactions between side chains in close proximity

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A blood pressure reading of 140/90 would be considered good for a healthy 20-year-old male.

a. true b. false

Biology & Microbiology

Xylem is composed of all of the following cell types except:a

tracheids. b. vessel elements. c. fibers. d. parenchyma. e. sieve tube elements

Biology & Microbiology

When two solutions that differ in solute concentration are placed on either side of a selectively permeable membrane, and osmosis is allowed to take place, the water will ________

A) exhibit a net movement to the side with lower water concentration B) exhibit a net movement to the side with higher water concentration C) exhibit a net movement to the side with lower solute concentration D) exhibit an equal movement in both directions across the membrane

Biology & Microbiology