What is the best evidence that all life evolved from prokaryotic rather than eukaryotic ancestors?
A. Bacteria are unicellular.
B. Prokaryotes possess peptidoglycan in their cell walls.
C. The oldest fossil form of life known is prokaryotic.
D. Prokaryotes possess flagella.
Answer: C. The oldest fossil form of life known is prokaryotic.
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The DNA sequence capable of pairing with 5' CGATTAGT 3' is:
A. 5' CGATTAGT 3'. B. 5' GCTAATCA 3'. C. 3' CGATTAGT 5'. D. 3' GCTAATCA 5'. 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 base pairing? 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?
Who was the first person to isolate microbes from disease victims by smearing blood, pus, or sputum samples onto gelatin media?
Louis Pasteur Hans Christian Gram Albert Neisser Robert Koch
Millennium Development Goal 4 is to reduce _________________ mortality.
Fill in the blank(s) with the appropriate word(s).
How is sexual reproduction different from asexual reproduction?
A. Sexual reproduction occurs with only a single parent. B. Asexual reproduction requires testes and ovaries. C. Sexual reproduction requires fertilization of an egg by a sperm. D. Asexual reproduction requires two kinds of cell division.