The process of activating sludge from waste water involves

A. chlorination.
B. heat and pressure.
C. radiation.
D. filtration.
E. aeration and stirring.


Answer: E

Biology & Microbiology

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Which neurotransmitter functions to elevate mood?

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Colchicine is a toxin that binds to tubulin proteins and prevents microtubules from elongating. What effect might this have on dividing cells?

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All of the following are glial cells except

A) interneurons. B) oligodendrocytes. C) astrocytes. D) Schwann cells. E) both choices A and D

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In Drosophila, sex determination is carried out by

A) a cascade of alternative splicing. B) the SRY gene. C) histone modification. D) the DMRT1 gene. E) All of these

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