Grade 10 Biology unit 2 2. 5 Seeds monocots and dicots скачать в хорошем качестве

Grade 10 Biology unit 2 2. 5 Seeds monocots and dicots

#grade 10 biology unit 2 2.5 seeds ;monocots and dicots Subscribe for more!! comparing dicot and monocot seeds: Dicot vs. Monocot Seeds: A Key Difference in Structure Seeds are the result of sexual reproduction in plants, containing the embryo and food reserves for germination. Flowering plants are divided into two groups based on the number of cotyledons (seed leaves) in their seeds: dicots and monocots. • Dicot Seeds (Dicotyledons): • Cotyledons: Two cotyledons (seed leaves) present. These cotyledons often store food or become the first photosynthetic leaves after germination. • Embryo: The embryo has a well-defined plumule (embryonic shoot), radicle (embryonic root), and hypocotyl (embryonic stem). • Endosperm: Food storage may be in the cotyledons, and the endosperm may be reduced or absent in mature seeds. • Seed Coat: Usually present, protecting the embryo. • Examples: Beans, peas, peanuts, sunflowers, apples. • Monocot Seeds (Monocotyledons): • Cotyledon: One cotyledon (seed leaf) present. The cotyledon usually transfers stored food from the endosperm to the developing embryo. • Embryo: The embryo has a plumule and radicle, but the plumule is often protected by a coleoptile (a sheath) and the radicle by a coleorhiza. • Endosperm: A large endosperm is usually present, providing the primary source of food for the germinating seedling. • Seed Coat: Fused with the fruit wall in many monocots (e.g., grains). • Examples: Corn, wheat, rice, grasses, lilies, orchids biology