What type of chromosome structure is commonly found in hyperthermophiles?
What will be an ideal response?
positive supercoiling
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What is the minimum number of aminoacyl-tRNA synthetase enzymes needed to attach amino acids to all the various tRNA molecules?
A. 61 B. 20 C. 64 D. As many as there are different tRNAs.
A bride-to-be is enjoying a manicure and a facial before her hair is styled for the wedding. What organ system is being pampered?
A. lymphatic system B. integumentary system C. endocrine system D. digestive system Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about the skin, hair, and nails? What other information is related to the question? Choose Answer Given what you now know, what information 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?
Which event accounts for 20% of the greenhouse gases recorded annually?
a. deforestation of dry tropical forests b. deforestation of moist tropical forests c. burning of fossil fuels d. burning of coal e. urbanization
Which of the following events is not a characteristic of successful seed germination?
A. The seedling orients itself relative to gravity. B. The embryo becomes desiccated. C. New growth occurs at the meristems. D. The radicle breaks through the seed coat. E. The shoot becomes photosynthetic.