In plants and algae, which of the following is a by-product of photosynthesis?
A. O2
B. CO2
C. H2O
D. C6H12O6
E. H+
A
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Which of the following statements is true regarding fermentation?
A. It can be used as an alternative to photosynthesis. B. It requires oxygen. C. It results in the partial oxidation of C6H12O6. D. It releases more energy from C6H12O6 compared to cellular respiration. E. None of these statements about fermentation is correct.
The electronegativity of nitrogen (N) is 3.0, while the electronegativity of hydrogen (H) is 2.1. Knowing this, consider how the electrons will be shared in ammonia (NH3 ). What do you predict about the polarity of ammonia?
A. Each H atom has a partial positive charge B. The N atom has a partial positive charge C. Each H atom has a partial negative charge D. The N atom has a strong positive charge
When ________ and ________ are broken down excess nitrogen is released that must be eliminated by the excretory system.
A. proteins; salts B. glucose; fatty acids C. nucleic acids; sulfur D. amino acids; nucleic acids
Of the following, the social trend that would cause the fastest population increase is ________
A) more older men getting married B) decreasing age of first pregnancy C) lower nutritional values D) declining fecundity