Biology, 02.08.2019 18:10, jaaiphieaslade
Which of the following is a characteristic of vitamin d nutrition? a. pigments in dark skins increase vitamin d synthesis. b. only about one-half of the world's population relies on sunlight to maintain adequate vitamin d nutrition c. prolonged exposure to sunlight degrades the vitamin d precursor in skin, thus preventing vitamin d toxicity d. vitamin d deficiency may be created by a calcium deficiency e. in people living in northern u. s. cities, vitamin d stores from synthesis during the summer are usually sufficient to meet the needs during the winter
Answers: 2
Biology, 22.06.2019 11:00, evandlubbep6bsvu
Need the diagram below, which is not drawn to scale, shows the position of the earth, moon, and sun. what type of eclipse occurs when the earth, moon, and sun are lined up in the order shown? a. planetary eclipse b. solar eclipse c. martian eclipse d. lunar eclipse
Answers: 1
Biology, 22.06.2019 19:00, katherineweightman
1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?
Answers: 2
Biology, 22.06.2019 20:30, jackson5637
Glands that the body deal with stress and respond to emergencies.
Answers: 1
Which of the following is a characteristic of vitamin d nutrition? a. pigments in dark skins increas...
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