All organisms in the kingdoms Proista, Plantae, Fungi, and Animalia are

a. multicellular organisms
b. photosynthetic organisms
c. eukaryotes
d. prokaryotes


Ans: c. eukaryotes

Biology & Microbiology

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The disinfectant of choice for municipal water supplies is ________.

A. ultraviolet light B. either fluorine or chlorine C. fluorine D. chlorine

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Calculate the pKa of lactic acid, given that when the concentration of lactic acid is 0.01 M and the concentration of lactate is 0.002 M, the pH is 2.9

A. 3.9 B. 3.6 C. 3.2 D. 2.5 E. 2.2

Biology & Microbiology

Acceleration or head movements cause the fluid in the vestibular apparatus to stimulate action potentials by ________

a. bending cilia on mechanoreceptors b. binding to axons of sensory receptors c. bending hair cells against the organ of Corti's tectorial membrane d. putting pressure on Pacinian corpuscles

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A graded potential occurs when _______.

a. a neurotransmitter binds to a receptor on the dendrites or cell body and causes depolarization b. a neurotransmitter binds to a receptor on the dendrites or cell body and causes repolarization c. a neurotransmitter binds to a receptor on the axon and causes depolarization d. a neurotransmitter binds to a receptor on the axon and causes repolarization

Biology & Microbiology