Dawn recorded her measurement of the mass of a sample of leaves as 13 grams (g). four of her classmates measured the same sample and recorded the following data: 30 g, 31 g, 29 g, and 30 g. all students used the same balance during the same class period. dawn’s data are most likely inconsistent due to human error. biased procedures. broken instruments. accurate measurement.

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.