If you open a can of chicken noodle soup and immediately examine it microscopically, you will find no microorganisms. If you let the open can sit on the shelf for a few weeks and then examine it, you will find many microorganisms
The origin of these microorganisms is most likely
A) spontaneous generation.
B) airborne microorganisms.
C) endosymbiotic evolution.
D) prebiotic evolution.
E) improper sterilization of the soup prior to canning.
B
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In bacteria, the cell wall is composed mainly of
a. peptidoglycans. b. lipids. c. glycoproteins. d. proteins. e. various polysaccharides.
"Perception" differs from "sensation" when
referring to a stimulus in a. the type of receptor stimulated. b. understanding the significance of the stimulus. c. the number of receptors that depolarize. d. feeling exactly what is happening at the site. e. responding to the stimulus
Most ATP is formed by the process of
a. glycogenolysis. b. phosphorylation. c. cellular respiration. d. fermentation. e. anaerobic respiration.
What does superoxide dismutase do? Catalase? What groups of organisms possess these enzymes?
What will be an ideal response?