EVERYDAY SCIENCE

Detailed explanation-1: -The energy from ATP is used by the organism to obtain, transform, and transport materials, and to eliminate wastes. environment as heat. Given this inefficiency, there are generally fewer organisms at higher levels of a food web.

Detailed explanation-2: -Organisms can use the ATP they make as the source of energy to help them obtain raw materials and nutrients, to transform materials in chemical reactions, to transport materials (for example, active transport), and to eliminate wastes. ATP is essential for metabolic processes.

Detailed explanation-3: -Moving substances up their electrochemical gradients requires energy from the cell. Active transport uses energy stored in ATP to fuel the transport.

Detailed explanation-4: -The chemical energy that organisms need comes from food. Food consists of organic molecules that store energy in their chemical bonds. In terms of obtaining food for energy, there are two types of organisms: autotrophs and heterotrophs.

Detailed explanation-5: -Cellular respiration is the process that occurs in the mitochondria of organisms (animals and plants) to break down sugar in the presence of oxygen to release energy in the form of ATP. This process releases carbon dioxide and water as waste products.