Which will most likely cause an increase in the frequency of genetic mutations in humans?
А
increased exposure to mold spores in the air
B
increased exposure to the rising levels of atmospheric CO2
с
increased exposure to bacteria in drinking water
D
increased exposure to X-rays

Increased exposure to X-rays

Explanation:

X-rays shoot harmful radiation through your body, that's why when you go to the dentist or other places and they take a X-ray they give you a lead vest to protect your organs from unneeded radiation.

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many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.