What is the power house of the cell called

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.