Plant diversity is essential to the survival of biotic communities. Plants provide fiber e.g. cotton, flax linen, paper, cardboard. Plants come in all shapes and sizes. The plant kingdom includes unicellular alga to giant trees. Land plants evolved from ocean dwelling alga-like ancestors.
Fertilization depends on water.
Dicot e.g. bean Most advanced, most dominant, because of its reproductive features. It is the study of how plants function in order to grow, develop, survive and reproduce, and why plants behave in a particular way. Plant physiology is one of the most important and exciting areas in plant biology. Physiologists, biochemists, molecular biologists and geneticists want to understand these complex living processes at the biochemical and molecular level. When we understand how plants work, the scientific knowledge can be directly applied to benefit agriculture and the environment.