To determine viable cell counts of a heat-sensitive bacterial isolate, which cell counting method would be best to AVOID?
A) spread-plate method
B) pour-plate method
C) live staining and direct counting with a microscope
D) both spread- and pour-plate methods
Answer: B
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a. Food b. Organelles c. Materials d. Energy
Which of the following characteristics are shared by all worm phyla?
A. Displaying bilateral symmetry B. Being heterotroph C. Having tissues D. All of the above are characteristics shared by all worm phyla
Oil pollution is a serious problem throughout the world. Petroleum kills organisms by:
A) disrupting biological membranes. B) coating surfaces of organisms. C) both of the above.
In the absence of sunlight, plants are not able to engage in the Calvin cycle due to a lack of
a. ATP. b. NADPH. c. oxygen. d. Both a and c are correct.