Environmental Science
Industrial melanism is an example of

drug resistance
protective resemblance with the surrounding
defensive adaptation of skin against UV radiations
darkening of skin due to industries

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Environmental Science
During the winter solstice in the Northern Hemisphere:

All of these
Astronomical winter begins in the Northern Hemisphere
The noon sun is overhead at 23.5o S latitude
At middle latitudes in the Northern Hemisphere, this marks the longest night of the year

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