The metabolic processes called fermentation
A) produce substrates for the Krebs cycle.
B) are alternatives for the pentose phosphate pathway.
C) use an organic molecule as a final electron acceptor.
D) occur only when oxygen is readily available.
E) produce substrates for glycolysis.
C
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A fetus's exposure to ____ is the leading preventable cause of birth defects
a. alcohol b. X-rays c. viruses d. thalidomide e. Toxoplasma gondii
To increase the rate of a reaction you could:
A. Add more products. B. Decrease the temperature. C. Add more reactants. D.
The ____ prevents important substances in the xylem form leaking into the root cortex
a. primary xylem b. root hairs c. endodermis d. tonoplasts e. pericycle
The heart wall muscle layer is known as the ____
a. epicardium b. pericardium c. endocardium d. endothelium e. myocardium