Mary and Marshall attend the same school. Their socioeconomic and family environments are similar. Mary struggles in school due to a learning disability. She works hard and has managed to stay on grade level in every subject. Marshall is an intelligent young man who does well in school but is a bit distracted by his work schedule. Which student is more likely to earn a high school diploma

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