Which specific defense mechanism protects against foreign organisms that have managed to infect body cells by destroying these cells?
A) cell-mediated immune system
B) antibody-mediated immune system
C) pyrogens
D) inflammatory response
A
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In the cells of some organisms, mitosis occurs without cytokinesis. This results in _____
A) cells with more than one nucleus B) cells that are unusually small C) cells lacking nuclei D) destruction of chromosomes E) cell cycles lacking an S phase
A novice gardener notices that many plants in his garden look wilted. What osmotic solution would you suggest the novice gardener use to best return the plants to full health?
A. Place the plants in a 15% solute solution so water can be actively transported out of the plant cells. B. Place the plants in a 5% solute solution so water can be actively transported out of the plant cells. C. Place the plants in a 5% solute solution so water can diffuse into the plant cells. D. Place the plants in a 15% solute solution so water can diffuse out of the plant cells. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about water uptake in plants?What other information is related to the question? 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?
The agency that has published a guide to hazardous waste reduction is:
a. DHEC. b. OSHA. c. CDC. d. U.S. Environmental Protection Agency (EPA).
Which of the following microscope types would be least useful in viewing unstained living cells?
A. Phase contrast B. Interference C. Bright-field D. Dark-field