2. Why is the Stone Age called Paleolithic?

How has the immigration of the 1990s affected the social and economic life of the united states?

Oigan ayudenme enserio por fa miren si en colombia son las 2: 00 que hora son en rusia por fa responde

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