All of the following made the separation of these DNA fragments possible EXCEPT
a. the negative charge of the DNA
b. the percentage of G + C bases
c. the porous nature of the gel
d. different fragment sizes
e. positive electrode placement
Answer: b. the percentage of G + C bases
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The pulmonary veins:
A. carry oxygenated blood from the lungs to the left atrium. B. carry deoxygenated blood from the lungs to the left atrium. C. carry oxygenated blood from the lungs to the right atrium. D. carry deoxygenated blood from the lungs to the right atrium. E. carry deoxygenated blood from the heart to the lungs.
What would be strong evidence to suggest a protist is phototrophic?
A. Many lysosomes B. Locomotion via several flagella C. The presence of chloroplasts D. Silicon dioxide cell walls E. A benthic lifestyle 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 nutritional strategies of protists? How does it relate to the question? · 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?
How is osmosis different from simple diffusion?
a. Water cannot pass freely across the membrane. b. Water requires energy to move across a cytoplasmic membrane. c. Water movement is driven by the concentration of solutes rather than its own concentration. d. Water requires a special permease.
The inner medulla of the kidney is ________ to the loop of Henle and therefore, water leaves the loop at the descending limb and collecting duct.
A. hypotonic B. hypertonic C. isotonic D. balanced E. None of these.