Which of the following has the greatest effect on the rate of chemical cycling in an ecosystem?
A) the ecosystem's rate of primary production
B) the production efficiency of the ecosystem's consumers
C) the rate of decomposition in the ecosystem
D) the trophic efficiency of the ecosystem
E) the location of the nutrient reservoirs in the ecosystem
Answer: C
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Quality control is set up on urea media. Which two organisms should be used to determine the validity of the media?
a. C. ulcerans and C. diphtheria b. C. diphtheria and Streptococcus pneumo-niae c. C. ulcerans and Corynebacterium pseu-dotuberculosis d. C. glucuronolyticum and C. ulcerans
A doctor suspects his patient has diabetes insipidus. What is the most likely match to the blood and urine profile of this patient?
A. A
B. B
C. C
D. D
Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
Gather Content
What do you already know diabetes insipidus? 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?
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?
If a suspension of cells is frozen and fractured, the most likely path of the fracture plane will be
a. between the cell surface and the outside solution. b. between the membrane and the cytoplasm of the cells. c. through the middle of the cytoplasm. d. between the two leaflets of the cell membranes.
Considering the principle of complementary base pairing, you would expect an equal ratio of which two nitrogenous bases in a DNA molecule?
A) adenine and guanine B) thymine and cytosine C) cytosine and guanine D) guanine and thymine E) uracil and adenine