Which statement best describes selective breeding? A. People only allow organisms with certain traits to reproduce
B. Researchers in a lab use cloning to produce organisms that have identical genes
C. Individuals with genes that help them survive in nature are most likely yo reproduce
D. Scientists use enzymes to cut DNA, copy it, and paste pieces of it back together

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.