1. What organisms undergo cellular respiration? 2. Why is the mitochondria called the powerhouse of the cell?
3. Why do some cells have more mitochondria?
4. What are the inner folds called?
5. What is the fluid called?
6. What is cellular respiration?

1. Oxygen is required for cellular respiration and is used to break down nutrients, like sugar, to generate ATP (energy) and carbon dioxide and water (waste). Organisms from all kingdoms of life, including bacteria, archaea, plants, protists, animals, and fungi, can use cellular respiration.
2. Mitochondria are often called the “powerhouses” or “energy factories” of a cell because they are responsible for making adenosine triphosphate (ATP), the cell's main energy-carrying molecule.
3. Some cells have more mitochondria than others because they need to process more glucose and produce more ATP.
4. The inner membrane folds over many times and creates layered structures called cristae.
5. In physics, a fluid is a substance that continually deforms (flows) under an applied shear stress, or external force. Fluids are a phase of matter and include liquids, gases and plasmas.
6. Cellular respiration is the process through which cells convert sugars into energy. To create ATP and other forms of energy to power cellular reactions, cells require fuel and an electron acceptor which drives the chemical process of turning energy into a useable form.
Hope I helped you!