Antibiotics have been used to treat bacterial infections since the 1940s. In 7 points recent years, many antibiotics have become less effective as resistance to
these treatments rises. Which statement best describes how bacterial
resistance to antibiotics demonstrates natural selection?

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.