Factors that increase the role of diffusion

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above

Climate like that in the sahara desert have the fastest rates of weathering

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