Explain why the a single loop circulatory system is able to supply raw materials to cells as fast as the double – loop circulatory system. ​

Average annual precipitation and are the two major features that define the biomes on earth.

Does masterbation affect height growth or loss of growth hormone?

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.