An example of potential energy is . the flowing of water

electricity flowing through a wire

a bullet fired at high velocity

the falling of a leaf from a tree

the chemical energy in a candy bar

In what for do plants utilize nitrogen? why do they need nitrogen?

(99 points) be serious! how do farts work? how do you fart without it stinking? serious answers only

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.