Why might bacteria be considered more successful than humans?
A) Humans are resistant to bacterial infections.
B) Bacteria have very specialized food sources.
C) Bacteria have been evolving for billions of years.
D) Bacteria are less diversified than humans.
C
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Imagine that fungal hyphae were as thick as a human hair. How might this increase in thickness affect the ecological role of fungi?
A. Their rates of decomposition of detritus would decrease because their ratio of surface area to volume would be decreased. B. Their rates of decomposition of detritus would increase because their ratio of surface area to volume would be increased. C. There would be no effect on the rates of decomposition of detritus. D. There would be no effect on the rates of decomposition of detritus because the fungi would still be heterotrophic.
Four of the five answers are correct ways to reduce the impact of plastic trash. Select the exception
a. Choose durable items over disposable ones. b. Recycle. c. Avoid buying plastic where alternatives exist. d. Dispose of waste properly. e. Use plastic shopping bags.
Systolic pressure reflects the
A. contraction of the atria. B. relaxation of the atria. C. contraction of the ventricles. D. relaxation of the ventricles. E. heart rate.
Membrane proteins are not very soluble in water because they possess long stretches of nonpolar amino acids that are
A. hydrophilic. B. are transmembranal. C. hydrophobic. D. too long to interact with the water molecules. E. used as transport channels.