Which statement concerning protein synthesis in cells is most accurate? 1. proteins are synthesized at the mitochondria in all living things 2. proteins are synthesized at the ribosomes in all living things 3. proteins are synthesized at the ribosomes in plant cells only 4. proteins are synthesized by the nuclei in animal cells only.

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.