This is the major organ of the circulatory system that causes blood to flow through the body by its pumping action.

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.

Which of these correctly describes the difference between processes that take place in prokaryotic and eukaryotic cells?

Match the enzymes to their role in the dna replication process