What are the possible causes of digestive system disorders like diarrhea and constipation? .
a- a disorder in excretion of water by the large intestine.
b-a disorder in absorption of water by the large intestine.
c-a disorder in release of digestive enzymes by the large intestine

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.