Which activity would stimulate the human immune system to provide protection against an invasion by a microbe?

What are some characteristics of a free enterprise economy?

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

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.