Which color changes represent a positive reaction for the presence of protein using the biuret test

a. purple to blue
b. yellow to green
c. blue to purple
d. green to red
e. blue to brown-red


Answer: e. blue to brown-red

Biology & Microbiology

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Which of the following are functions of decomposer fungi? Check all that apply.

_____ breakdown of leaf litter _____ breakdown of wood _____ breakdown of dead animals _____ recycling of essential nutrients _____ breakdown of pathogenic bacteria

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Movable bones are features of the sense organs

associated with a. sight. b. hearing. c. taste. d. smell. e. touch.

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Sexual selection:a

is the basis for establishing elaborate societies. b. leads to a reproductive advantage for some individuals over others of the same sex and species. c. favors monogamous mating systems. d. leads to the investment of parental care of offspring. e. is not a type of natural selection.

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How would the shape of a DNA molecule change if adenine paired with guanine and cytosine paired with thymine?

A) The DNA molecule would be longer. B) The DNA molecule would be shorter. C) The DNA molecule would be circular. D) The DNA molecule would have irregular widths along its length.

Biology & Microbiology