Which of the following is a disadvantage of using corn to manufacture ethanol as a fuel additive?
A. Ethanol contains far less energy than other fuels.
B. Ethanol absorbs water and would thus corrode fuel pipelines used in transport.
C. Use of corn as a fuel source drives up the cost of grain worldwide.
D. All of these are disadvantages.
Answer: D
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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. pyrvuate; lactate B. NADH; pyruvate C. lactate; pyruvate D. NAD+; pyruvate
Research indicates that ____ defects occur ____ often with multiple births than single births
a. central nervous system; less b. heart; more c. musculoskeletal; more d. gastrointestinal; less e. chromosomal; less
Answer the following statements true (T) or false (F)
1.A dinoflagellate has both a transverse flagellum and longitudinal flagellum. 2.Golden algae, diatoms, and brown algae contain yellowish pigments. 3.Alternation of generations means having alternating, multicelled haploid and diploid phases in a life cycle. 4.All protists are single-celled. 5.Protists can be heterotrophs.
Answer: c