Label the leaf arrangements as opposite, whorled, or alternate. 
A. ________B. ________C. ________
What will be an ideal response?
A. alternate
B. whorled
C. opposite
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Nutrients are reintroduced into the upper reaches of the oceans from deeper areas by the process of:
a. wind and ocean currents. b. respiration of marine animals. c. excretion of wastes by animals. d. sinking of dead organisms. e. their attachment to floating plankton.
Quinolones are a group of broad-spectrum antibiotics that specifically target topoisomerase. Explain how this contributes to cell death in bacteria. Would you expect these drugs to kill hyperthermophilic prokaryotes too? Why or why not?
What will be an ideal response?
When the membrane potential of a neuron reaches the threshold level:a
voltage-gated sodium channels open, and sodium diffuses out of the cell. b. voltage-gated potassium channels open for a very brief period. c. voltage-gated sodium channels close, so sodium cannot diffuse out of the cell. d. the sodium channel protein changes its shape to open the gates of the channel. e. the membrane potential is more negative than when at rest.
How can the success of one group of organisms promote the adaptive radiation of a second group?
A) by providing new food resources, habitats, etc. for the second group to utilize B) by competing with the second group, promoting the second group's adaptive radiation C) by preying on the second group, which hastens the second group's adaptation D) by filling most of the available niches, which speeds up the second group's diversification