The synthesis of Vitamin D decreases with age. This is <span>due because of a fall in 7-dehydrocholesterol levels.</span>
Answer:
Explanation:
the energy needed to raise the temperature of 1 kilogram of water through 1 °C, equal to one thousand small calories and often used to measure the energy value of foods.
Pulling a wagon uphill; the more uphill the wagon is, the greater amount of energy that will be exerted when the wagon moves downhill.
