The difference between aerobic respiration and fermentation is
A. the amount of NADH that is produced in glycolysis.
B. the electron carriers used in the electron transport chain.
C. the electron acceptors used in the electron transport chain.
D. the fate of the NADH and pyruvate produced in glycolysis.
Ans: D. the fate of the NADH and pyruvate produced in glycolysis.
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The ability to determine where a sound is coming from depends primarily on
A. differences in sound intensity in the two ears. B. differences in time of sound arrival to the two ears. C. differences in sound frequency received at the two ears. D. differences in both frequency and intensity at the two ears. E. None of these choices are correct.
Which of the following is a natural process of plants that can be used by humans to remove toxins from soils? Check all that apply.
_____ secretion of a substance from the roots that breaks down the toxic chemical _____ "storage" of a toxic chemical in plant tissues, which are then removed from the site _____ root pressure pushing toxins from deep in the soil towards the surface _____ physiological breakdown of the chemical into harmless products _____ transport of toxins absorbed by the roots into the shoots, where they can be collected more easily
The difference between normal and sickle-cell hemoglobin is _____
a. the number of amino acids in the molecule b. the substitution of one amino acid for another c. the number and orientation of the amino acid chains attached to the heme portion of the molecule d. the number of oxygen molecules that can be carried e. the types of blood cells that produce each protein
Some companies that produce paper will also produce a by-product that is sold as a binder (something that binds, or holds, things together). From which part of trees does this by-product come?
A) leaves B) mycorrhizae C) lignin D) stomata