Answer:
d. All of these statements are true.
Explanation:
According to the "A Citizen's Guide to Radon" manual on the third page:
<em>"Radon comes from the natural (radioactive) breakdown of uranium in soil, rock and water and gets into the air you breathe. Radon can be found all over the U.S. It can get into any type of building—homes, offices, and schools—and </em><em>result in a high indoor radon level</em><em>. But you and your family are most likely to get your greatest exposure at</em><em> home</em><em>, where you </em><em>spend most of your time</em><em>."</em>
According to a study by Brazilian researchers, the greatest exposure to gas radon occurs indoors, such as tunnels, wineries, mines and homes. All of these environments are typical of developed countries that exploit environments to build cities and homes for the population.
DNA contained within chromosome, chromosome in the cell nucleus
For an individual to detect an odor then molecules must first dissolve in the
mucus before they bind to the receptor sites of the olfactory hairs.
The nose is the organ responsible for smelling and it possesses key
components such as the mucus found in the olfactory epithelium and
receptors found in the olfactory hairs for processing the type of smell to the
brain.
When individuals inhale substances, they are <em>dissolved</em> in the mucus to aid
their binding to the receptors and their subsequent relay of the signal to the
brain for processing.
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It makes digestive enzymes that flow through the pancreatic duct to the small intestine
