Which of the following is a reason to question the sustainability of ethanol production from corn?
A. Gas mileage is better with ethanol than gasoline
B. Only waste materials from corn production are used to make ethanol, so it doesn't compete with food production.
C. Ethanol burns cleaner than gasoline.
D. Farmers use a lot of fossil fuels to grow the corn used to make ethanol.
E. Conventional agriculture uses less energy and increases the EROI of corn ethanol.
Answer: D. Farmers use a lot of fossil fuels to grow the corn used to make ethanol.
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If you were given a bacterial strain with a mutation in the promoter region of the trp operon the most likely effect would be
A. interference with RNA polymerase binding. B. to block the repressor from binding. C. derepression of the trp operon. D. enabling the trp operon to be expressed in the absence of tryptophan. E. lack of expression of just the first gene in the operon. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about promoters? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A recipient cell that is temporarily diploid for a portion of the genome during the replacement process is called a(n) ________.
A. exogenote B. merozygote C. endogenote D. None of the choices are correct.
Localization economies are cost savings that a firm achieves by
A) using local rather imported than labor. B) clustering with other similar firms. C) locating in rural areas. D) locating in multiple areas. E) avoiding globalization.
This photograph illustrates micropropagation, a form of artificial reproduction in plants. Which of these is unlikely to be an application for micropropagation?
a. preserving plants vulnerable to extinction
b. growing plants for experiments in labs
c. mass-producing grain for famine relief
d. breeding plants with pharmacological value