Which behavior can reduce pollution that occurs due to the use of coal?
o
a. turn off electric lights when they are not in use.
b. support the construction of new coal-based power plants.
o
c. install a second refrigerator in the hot garage.
d. replace a conventional car with an electric car.
submit

A

Explanation:

coal is majorly used to produces electricity. The coal is ignited and the heat produced used to heat water to steam. The steam is then used to drive turbines with a dynamo effect to produce electricity. Turning off lights when not in use reduces the demand for electricity hence reducing the amount of coal needed to meet this demand.

Other ways to conserve energy is using bulbs with low energy demand - such as LEDs - and  improving natural lighting indoors.

credits to  morga7042

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The correct answer is - Yes, the genetic engineer should create a genomic library or a cDNA library.

Explanation:

mRNA isolated from the toxin extracted from the venom gland of the scorpion to create a cDNA library. The cDNA sequence is reverse transcribed by the mRNA that lacks the introns as prokaryotic organisms such as bacteria cannot splice introns.

If the engineer wants to express the toxin in bacteria then he required a cDNA sequence as a genomic clone can not use to clone for making proteins.  mRNA should be isolated from the venom gland so it can synthesize cDNA library enriched with toxin protein sequence.