What is the difference between a community and a population? a.) a community has only one organism, while a population has many organisms. b.) a population has only one ecosystem, while a community has many ecosystems. c.) a community has only one biome, while a population has many biomes. d.) a population has only one species, while a community has many species.

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.