Secondary treatment of sewage involves the use of which type of process?

A. Virus removal/inactivation
B. Biological removal of inorganic nutrients
C. Biological removal of dissolved organic matter
D. Physical/chemical removal of insoluble particulate materials


Answer: C

Biology & Microbiology

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Despite the enormous amount of solar energy that plants are exposed to, photosynthesis is only able to transform about 1-2% of that energy into stored chemical energy

List three major factors responsible for this phenomenon and explain how each contributes to this inefficiency. What will be an ideal response?

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Cerebrospinal fluid is found in the ________.

A. arachnoid mater B. pia mater C. subarachnoid space D. dura mater E. All of the choices are correct.

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RNA polymerase has no proofreading activity during transcription

Indicate whether the statement is true or false

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An example of a DNA virus is

a. rhinovirus (cold virus) b. orthomyxovirus c. herpes virus d. HIV

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