BSCI 442 Introduction to Course Lec. Green plants provide the world s supply of food. Plants provide the world s supply of O2 in the atmosphere. 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.