Carl is middle age and single. he has a high school education and works at a hotel as a desk clerk. he lives in a tiny apartment. even though he doesn't have a high income, he tries to live an active life attending sporting events, and sometimes he brings a date with him. to which prizm group does carl belong?

Often, a goby fish and a shrimp will live together in a burrow the shrimp has dug in the sand. the shrimp is almost blind and therefore is unable to see predators approaching when he is outside of the burrow. when the shrimp is in danger, the goby fish touches the shrimp with its tail to warn him. then, both go back into their burrow for safety. which type of relationship does this represent? a. mutualism b. parasitism c. commensalism d. predator/prey