Analysis of a water sample by a series of presumptive, confirmatory, and completed tests that help establish an estimate of coliform numbers in the water is called
A. coliform determination test.
B. membrane filter method.
C. most probable number (MPN) procedure.
D. standard plate count.
E. None of the choices are correct.
Answer: C
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Scientists in Switzerland compared the total surface area of the small intestine in different species of bats. When the calculations were done as if the inner mucosal surface was smooth, the average inner surface area of the intestinal tube was 9.1 cm2 in one species. The mucosal surface area increased to 48 cm2 when the villi were factored in and reached a total of 0.13 m2 after adding in the membrane surface area of the microvilli. Approximately what percent of the total surface area of the small intestine in these bats can be attributed to the membrane surface area of the microvilli?
A. 12% B. 78% C. 55% D. 96% E. 28% Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about microvilli? 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?
The reproductive system is the only system that contributes to homeostasis
1.True 2.False
Generally, an ion with a ________ positive charge and ________ size will bind most strongly to a soil particle
A) greater; smaller B) smaller; larger C) smaller; smaller D) greater; larger
The motile feeding stage of protozoa is called the
A. food vacuole. B. trophozoite. C. oocyst. D. cyst. E. sporozoite.