3. Almost without exception, zoo animals weigh significantly more than their counterparts living in the wild. Why? a) Only the healthiest-and typically heaviest-wild animals are caught and used in zoo exhibits. b) The only animals that can survive in zoos are those without instincts. The lack of instincts is an adaptation in natural environments but also, unfortunately, causes individual to overeat when they have free access to food. c) Because zoo animals are fed custom-designed "lab-chow," they experience fewer bacterial infections. This enables them to devote fewer calories to their immune system, which increases their body weight. d) Zoo animals live in an environment that is different from their Environment of Evolutionary Adaptedness (EEA). Their evolved instincts to eat as much food as possible when they can obtain it are no longer appropriate, and they become overweight. e) Sexual selection for larger body size inevitably occurs when animals are maintained at higher density (animals per acre), such as in zoos. 4. Ben and David engage in a wrestling match and their friends unanimously decide that David is the winner. How would you expect Ben and David's testosterone levels to have changed from the beginning of the match to after the match? a) Ben and David's testosterone levels start off low at the beginning of the match. After the match, David's testosterone level increases. b) Ben and David's testosterone levels start off high at the beginning of the match. After the