A student made a model of the levels of organization which compared a human body system to the levels of systems in a plant. Considering the levels of organization in the human body, what structures for the plant are listed in order from the least complex to the
most complex?

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.