When a neuron membrane potential goes below its resting value it becomes
a. depolarized.
b. hyperpolarized.
c. repolarized.
d. damaged.
e. re-stimulated.
B
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Which of the following is important to the development of dorsal structures such as the neural tube and notochord?
A. Spemann's organizer B. noggin C. cadherins D. both Spemann's organizer and noggin E. both Spemann's organizer and cadherins
Which of the following traits is not seen in any species of lamprey?
a. backbone b. jaws c. oral disk with keratinized teeth d. metamorphosis
Bacterial plasmids often have genes that code for genetic exchange or antibiotic resistance
____________________ Indicate whether the statement is true or false.
What do all protists possess?
a. cell walls b. multiple, circular chromosomes c. chloroplasts d. microtubules and microfilaments