Why does prolonged exposure to UV light from the Sun or tanning beds increase the risk for getting skin cancer? increased exposure to UV light decreases the risk of a mutation occurring
increased exposure to UV light increases the risk of a mutation occurring
increased exposure to UV light decreases the immune system function
increased exposure to UV light has no effect on the risk for getting skin cancer

it increases chance of mutation of unrepaired skin cells that add up and create a tumoer

Explanation:

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.