This document provides an overview of plant classification and structure. It begins by discussing the importance of plants and how they are classified from the broadest groups of vascular vs. nonvascular plants. It then describes the major vascular plant groups of gymnosperms and angiosperms, and how angiosperms are further divided into monocots and dicots. The document outlines the key structures and functions of plant parts like flowers, leaves, stems, and roots. It also covers plant reproduction, growth, and environmental responses.