What was the initial atmosphere on Earth composed of? A. Hydrogen and Helium
B. Argon and Water vapor
C. Carbon dioxide and Sulfur
D. Nitrogen and Oxygen

Most of earth’s fresh water is found in oceans and seas stored in glaciers and ice caps groundwater stored beneath the surface found in lakes, rivers, streams, and reservoirs

Which label identifies the part of the atp molecule that changes when energy is released in the cells of all living things

Which of th following is needed for cellular respiration to occur