What situation may result when people stop taking their antibiotics too soon because they already feel better?
A. A drug-resistant strain is born.
B. The person will have to restart the antibiotic course.
C. The person will continue to feel fine.
D. The person will be immune to that type of infection.
Answer: A. A drug-resistant strain is born.
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Which of the following produces NADPH
A. light reactions alone B. the Calvin cycle alone C. both light reactions and the Calvin cycle D. neither the light reactions nor the Calvin cycle E. NADPH production is not a part of photosynthesis.
Given the half-life of radioactive carbon of 5730 years, if a sample from an archaeological site is analyzed, and it is determined to have 1/4 of the amount of 14C that a living organism would have, describe how you would go about aging this fossil
What will be an ideal response?
Platys and swordtails are related tropical freshwater fish. In studies, researchers have shown that female platys prefer males with swordtails, even though males of their own species do not have them. This was discovered by attaching artificial swordtails to platys males.What does this suggest about the origin of the swordtail feature?
A. Female preference for swords may have predated the origin of the feature itself. B. Evolution of swords later led to evolution of female preference for swords. C. The same gene that causes sword development also causes development of neural circuits for female preference. D. Adjacent genes on the same chromosome cause sword development and development of neural circuits for female preference. 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 evolutionary origins of a characteristic involved in sexual selection? 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? Reflection 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 statement about microarrays is false?
A) Microarrays enable scientists to determine the activity of thousands of genes at once. B) Microarrays use tiny portions of double-stranded RNA fragments from a large number of genes. C) Microarrays are used to determine which genes are active in different tissues or in tissues of different states of health. D) Microarrays use fluorescently labeled cDNA molecules to identify particular genes expressed at a particular time.