Which form of organization is classified between cell and organ?
a. atom
b. molecule
c. compound
d. organelle
e. tissue
ANSWER: e
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Under normal circumstances, the microbiota of the skin is kept in check by
A. a pH above 8. B. excessive moisture. C. phagocytic activity. D. a slightly acidic pH.
Squids are dominant nektonic predators in the open ocean
Indicate whether the statement is true or false
The condition known as microbial antagonism may be defined as
A) microorganisms that remain with a person throughout life. B) a relationship between two organisms where one member harms the other. C) a relationship between two organisms where only one member benefits. D) an unsuccessful microbial invasion due to the presence of preexisting microbes. E) a relationship between two organisms where both members benefit.
Consider the following two half reactions:NAD+ + H+ + 2e? ? NADH Eo (volts) = ? 0.32Pyruvate? + 2H+ + 2e? ? lactate 2? Eo(volts) = ? 0.19In a redox reaction involving NAD/NADH and pyruvate, ________ will be the electron donor and ________ will be the electron acceptor.
A. NAD+; pyruvate B. lactate; pyruvate C. NADH; pyruvate D. pyrvuate; lactate