Which of the following adversely affects the ozone layer?
A. Oil
B. Plastics
C. Chlorofluorocarbons
D. Coal and natural gas
E. Greenhouse gases
Answer: C
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If a somatic cell from a cat contains 40 picograms of DNA during G2 of interphase, how many picograms of DNA would be present in each cell during metaphase II of meiosis? (Enter the number only, not the units.)
What will be an ideal response? 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 know about meiosis? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
An RNA molecule is typically _____ ; a DNA molecule is typically _____
a. single-stranded; double-stranded b. double-stranded; single-stranded c. both are single-stranded d. both are double-stranded
The discovery of fossils of whale intermediates suggest that whales evolved from:a
sharks. b. aquatic reptiles. c. marine invertebrates. d. a larger marine mammal. e. four-legged, land dwelling mammals.
In the accompanying figure, label A represents:a
resting state.
b. repolarization c. threshold level. d. equilibrium potential. e. hyperpolarization.