Cholesterol functions in the plasma membrane to
A. serve as an energy molecule.
B. maintain hypertension.
C. transport ions.
D. maintain fluidity.
E. mediate steroid action.
Answer: D
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The totality of microbes that reside in/on humans, their genomes, and environmental interactions between the microbes and their human host are known as:
A. microbiology. B. the human microbiome. C. symbiosis. D. an enterotype.
Which of the following most accurately
describes the cellular activity associated with the actual passage of a nerve impulse? a. electrical discharge b. action of sodium-potassium pump c. positive feedback d. hyperpolarization followed by rebalancing e. active transport of ions
Which of the following could be a valid scientific hypothesis?
A) Moray eels find their prey primarily by following chemical cues. B) All marine animals must have gills. C) It is immoral to keep dolphins in captivity. D) Dogs are superior in intelligence and swimming capabilities compared to seals.
Which sequence correctly lists the different levels of biological organization, from the smallest and simplest to the largest and most complex?
(a). cells-organs-tissues-organ systems-organism (b). cells-tissues-organ systems-organs-organism (c). tissues-cells-organs-organ systems-organism (d). tissues-organs-organ systems-organisms-cells (e). cells-tissues-organs-organ systems-organisms