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Grade 10 biology unit 2 plants 2.3 structure and function of plant parts @UniqueAcademyfornaturalscience Plant Parts: Structure Dictates Function Plant parts are exquisitely designed; their structure is directly related to the specific function they perform. Here's a brief overview: • Roots: • Structure: Extensive branching, root hairs (increase surface area). • Function: Maximize water and nutrient absorption from the soil. Anchor the plant. • Stem: • Structure: Vascular bundles (xylem and phloem for transport), strong structural tissues (e.g., xylem). • Function: Support leaves and flowers. Transport water, nutrients, and sugars throughout the plant. • Leaves: • Structure: Thin, flat shape (increased surface area), stomata (pores for gas exchange), chlorophyll-containing cells (mesophyll). • Function: Maximize light capture for photosynthesis. Regulate gas exchange (CO2 in, O2 out). • Flowers: • Structure: Colorful petals (attract pollinators), stamens (male reproductive parts with pollen), pistil (female reproductive part with ovary). • Function: Facilitate pollination and fertilization for sexual reproduction. • Fruits: • Structure: Varied, can be fleshy or dry, often brightly colored or scented (attract animals). • Function: Protect seeds and aid in their dispersal (e.g., via animals, wind, or water). • Seeds: • Structure: Seed coat (protection), embryo (developing plant), endosperm (food reserve). • Function: Protect the embryo and provide nutrients for germination and early growth. In essence: The specific anatomical features (structure) of each plant part are directly related to their role (function) in the plant's survival and reproduction. Structure and function are intertwined.