One of the major elements of natural selection is that all species have genetic

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

Which of the following explains why a tree is often used as a model to represent the principle of common descent

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.