Which of the following has the lowest freezing point? the water that comes out of your kitchen faucets salty ocean water fresh lake water running river water

What percentage of light hits earth's surface directly?

Me with these questions image attached

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.