A climate that is characterized as "tundra" A) receives less than ten inches of precipitation.
B) is incapable of sustaining animal life.
C) is incapable of sustaining human life.
D) has permanently frozen subsoil.

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today

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

Which are evidence of the seafloor spreading? a. molten material b. magnetic stripes c. continental material d. drilled core samples e. ocean water samples