Select the best description of axon: a. stored in synaptic vesicles b. accumulates as yellow-brown granules as the cell ages c. contains a nucleus surrounded by cytoplasm receiving or input portion of a neuron d. carries nerve impulses toward another neuron, a muscle fiber, or a gland cell

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.