Organelles exist within cells, which exist within tissues. Communities exist within ecosystems, which exist in the biosphere.
Answer:
Plants are autotrophs, which means they produce their own food. They use the process of photosynthesis to transform water, sunlight, and carbon dioxide into oxygen, and simple sugars that the plant uses as fuel. These primary producers form the base of an ecosystem and fuel the next trophic levels.
ATP and NADPH are the carriers of energy
Answer: Chemical changes are different from physical changes because chemical changes have a chemical reaction.
Explanation: A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Often, physical changes can be undone, if energy is input. It's on google.