The earth’s changing distance from the sun during the year causes the seasons. select the best answer from the choices provided t f

Nucleic acid certain protein cell membranes certain carbohydrates

Compare the composition of the moon's surface with the composition of the earth's surface.

You and a group of friends are spending your vacation hiking through the mountains. it is cold in the mountains. you will be expending a lot of energy while hiking and you will need plenty of energy to keep you warm. you should pack foods high in to provide the most energy or kilocalories per gram of food. a) carbohydrates b) lipids (fats) c) proteins d) sugars