Plants

Plants are essential for any ecosystem. They provide all the energy for the ecosystem, because they can get energy directly from sunlight. They use a process called photosynthesis to use energy from the sun to grow and reproduce. They also must get nutrients from the soil. ... Plants require space to grow and reproduce.

The four major groups of plants are ferns, mosses, gymnosperms, and flowering plants. These groups have evolved at different times when Earth had...

Plants are classified into several different types including the mosses and liverworts (Bryophyta), the clubmosses and horsetails, the ferns (seedless Tracheophyta), and the gymnosperms and angiosperms (seed plants). Only the last group the angiosperms have flowers.