Where is the best place to find information about the hazards that are associated with a compound

An easy way to calculate the amount of energy available at each level is to what?

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

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.