Most biomass in trees is found in leaves, which do undergo photosynthesis
Indicate whether the statement is true or false.
ANS: F, wood, which does not
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Profuse watery diarrhea (i.e., "rice water stools"), leading to dramatic fluid loss, severe dehydration, and hypotension that frequently leads to death, is the hallmark of which toxin activ-ity?
a. Cholera toxin (CT) b. Enteric endotoxin c. Shiga toxin d. Toxin A
An amphipathic molecule has:a
two polar ends. b. two hydrophobic ends. c. a hydrophobic and a hydrophilic portion. d. only one hydrophobic end. e. only one hydrophilic end
Why has the dominant mutant allele for Huntington's disease been able to persist in human populations despite its
devastating effects? a. It has a heterozygote advantage. b. Its symptoms do not typically show until after the individual has had children. c. Its effects are not expressed in heterozygous individuals. d. Its effects are only expressed in homozygous recessive individuals. e. Its effects are only expressed in homozygous dominant individuals.
Fever helps the body fight infection in which of the following ways?
a. Increased body temperature decreases phagocytosis. b. Fever causes the creation of lysosomes. c. Fever inhibits the growth of some microorganisms. d. Fever reduces lymphocyte activity. e. Fever increases capillary permeability.