Which two statements must be true to define a species?

Impressions of tropical swamp plants were observed on rocks in polar regions. the impressions were dark black imprints, which means the fossils are examples of ( 1 ) the fossils tell us that polar regions ( 2 ) ( 1 ) a. carbonization b. mineralization c. trace fossils ( 2 ) a. had tropical plants that can grow in ice b. might have had a diffierent climate in the past c. will have abundent vegitation

According ti the following map, what are the most common mineral resources found in the united states?

Acountry that is changing its economic focus from agriculture to industry has a economy. a. mixed b. command c. developing d. traditional (not d)