A neutral atom must contain ________

A) an equal number of neutrons and electrons
B) an equal number of protons, neutrons, and electrons
C) an equal number of protons and neutrons
D) an equal number of protons and electrons


Answer: D

Biology & Microbiology

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Disruption of neural signaling can produce profound changes in mood and behavior. Cocaine exerts its effects by

A. blocking norepinephrine and dopamine reuptake from synapses. B. blocking serotonin reuptake from synapses. C. preventing neurotransmitter vesicle fusion with presynaptic neuron membranes. D. blocking the enzyme acetylcholinesterase. E. binding to the GABA receptor to enhance inhibitory neurotransmission.

Biology & Microbiology

In a lichen, the photobiont usually receives

a. nutrients. b. protection from herbivory. c. aid in sexual reproduction. d. enhanced dispersal of offspring. e. shelter from radiation and desiccation.

Biology & Microbiology

The process of gene expression includes two steps: ____________________ and ____________________

Biology & Microbiology

A decrease in blood pH would stimulate an increase in rate and depth of breathing.

a. true b. false

Biology & Microbiology