The earths energy budgeta. describes the quantities of natural resources availableb. describes the balance of energy that arrives at and then leaves earthc. describes how much money is spent on energyd. describes the recycling of materials on earth

Why is excretion necessary to maintain homeostasis?

Nucleic acid certain protein cell membranes certain carbohydrates

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis