In which kingdom do humans belong?
a. Eukarya
b. Animalia
c. Mammalia
d. Primates
e. Homininae
ANSWER: b
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The transduction of sound waves into electrical signals takes place
A. within the tectorial membrane as it is stimulated by the hair cell. B. within hair cells as they are bent against the tectorial membrane, causing them to depolarize and release neurotransmitter that stimulates sensory neurons. C. as the basilar membrane becomes more permeable to sodium ions and depolarizes, initiating an action potential in a sensory neuron. D. as the basilar membrane vibrates at different frequencies in response to the varying volume of sounds. E. within the middle ear as the vibrations are amplified by the malleus, incus and stapes.
The bottom or base of a pyramid of energy consists of:
a. primary producers b. secondary producers c. primary consumers d. secondary consumers e. tertiary consumers
At chemical equilibrium
A. no reactions are occurring in either direction. B. there are no more products being formed. C. there are no more reactants for the cell to utilize. D. the amount of reactants is equal to the amount of products. E. reaction rates are in balance.
Which type of chemical bond forms between a cation and an anion?
a. nonpolar covalent bond b. polar covalent bond c. ionic bond d. hydrogen bond