Plants with roots appeared about ______ million years ago.

A．Algae has existed for more than 430 million years.
B．It is impossible that algae might be the earliest plant on land.
C．Plants get food from animals in the oceans.
D．Evolution began after animals appeared on land.

A．life on land probably began about 430 years ago
B．the first animal on land came from oceans
C．there wouldn't be animals without plants
D．plants are the only form of life that is able to get and store energy