General characteristics of plants
all plants are multicellular eukaryotes that are photosynthetic autotrophs, but not all organisms with these characteristics are plants.
nearly all plants are terrestial organisms, although some have returned to water during their evolution. Living on land poses very different problems from living in the water. As plants adapted to living on land, complex bodies for different functions have evolved. For example, stems and leaves of most terrestial plants are covered with a waxy coating called the cuticle. The cuticle helps prevent desiccation, a major problem on land. Gas exchance cannot occur across the waxy surfaces, but carbon dioxide and oxygen can diffuse across little pores called stomata on the leaf’s surface. Plant cells also have walls made of cellulose. Carbohydrate is stored in form of starch generally in chloroplsts and other plastids.