Allows plants to support structures such as leaves and flowers due to the pressure of the central vacuole. In seeds stored proteins needed for germination are kept in protein bodies which are modified vacuoles. Plant Sciences Plant Science Life Cycles Alternation Of Generations Liverworts as the picture shows are small plants with flattened bodies or with flattened stems bearing overlapping scales. . There are over 300000 species of plants. This is a type of alternation of generations similar to that of mosses. Cells in a typical liverwort plant are haploid for most of its life cycle. Vacuoles also play a major role in. Common examples of plants include grasses trees and shrubs. Plants have an important role in the worlds ecosystems. Plants are multicellular organisms in the kingdom Plantae that use photosynthesis to make their own food. Paleobotany which is also spelled as palaeobotany is the branch of bo