refer to figure 9-22. suppose the government imposes a tariff of $20 per unit. the amount of revenue collected by the government from the tariff is

These are pieces of information that are not necessarily the meaning or purpose of writing

Applying main ideas what is the most important power of congress? a. fix standard weights and measures c. make the nation’s laws b. establish post offices d. borrow money select the best answer from the choices provided

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