A population descending from a single organism or pure culture isolate is called a ________.
A. strain
B. genus
C. subspecies
D. species
Answer: A
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The most common dental anesthetic used is lidocaine. Lidocaine blocks voltage-gated Na+ channels. Where along the facial nerve would you expect lidocaine to be active?
A. along the cell body B. at the dendrite C. along the axon D. at the axon terminals E. at the synaptic cleft
In the average human, the heart beats ____ times per minute
a. 10 b. 53 c. 72 d. 95 e. 120
"Z lines" in skeletal muscle are composed of
a. discs to which thin filaments are anchored. b. stacked thick filaments along with parts of thin filaments that overlap both ends. c. thin filaments but no thick filaments. d. thick filaments but no thin filaments. e. discs to which thick filaments are anchored.
Describe what occurs during prophase of mitosis.
What will be an ideal response?