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Transcript
Flowering Plants: Monocot versus Dicots 8-28-12 Plantae Kingdom Plants have: Cells Cell walls made of cellulose Chloroplasts which contain chlorophyll Roots, Leaves, Stems Photosynthesis CO2+water+sunlight O2+glucose Monocots & Dicots • Botanists are able to divide the 235,000 species of angiosperms(flowering plants) into two large groups based on the structure of their seeds • Inside the seeds of angiosperms are tiny embryonic leaves called cotyledons. The seeds of one group of angiosperms have one cotyledon, called monocotyledons or monocots. • Other angiosperms have two cotyledons. These are called dicotyledons or dicots Cotyledon (seed leaf) Monocots versus Dicots One cotyledon (seed leaf) Two cotyledons (seed leaves) Leaves Monocot versus Dicots Base of a Monocot Leaf: Note the Sheath which connects the Blade to the Stem Typical Dicot Leaf with Reticulate (Net) Venation Monocot Examples • Tulips, daffodils, irises, lilies, palm trees • Do you see veins that are parallel? Dicot Examples • Buttercups, peas, roses, sunflowers, maple trees, and dandelions • Do you see the netlike veins? Which is which? A is _____________ B is __________ Stems Monocot versus Dicot Cross Section of Corn which is a typical Monocot Cross Section of a typical Dicot Stem Root System Dicot versus Monocots Dicot Monocot Floral Parts Monocots Monocots versus Dicots Dicots
