Which of the following choices did Wegner give as evidence for continental drift? a) Fit of continents, rock sequences, glacial evidence
b) Identical fossil species on different continents (both plant and animal), Antarctic climate changes
c) Sea-floor spreading, mid-ocean ridge, and trenches
d) a and b only

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen