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Angiosperms Group 3: Seed producing, Vascular Plants • Type 2: Angiosperms (flowering plants) • Flower = reproductive structure – Attract animals to help spread pollen – Forms fruit to protect and spread seeds • Seeds – Grow inside the fruit – Inside the seed 1. Embryo 2. Food supply Seed Dispersal • Fruit brightly colored – Attracts animals • Seeds pass through animals digestive system • Seeds pooped in a new area to grow Fruit seeds in fox poop Angiosperm Groups • 2 groups: Based on seed type • Cotyledon: embryonic leaf • Two Categories: – Monocots: embryo with 1 seed leaf – Dicots: embryo with 2 seed leaves Monocots vs. Dicots ehh Know this one ehh ehh Know this one Apple Tree: Monocot or Dicot? 2 3 1 Net-like veins 4 5 Monocot or Dicot? 2 3 1 4 6 5 Monocot or Dicot? Monocot or Dicot? Monocot or Dicot? Veins run parallel Monocot or Dicot? Veins run parallel Monocot or Dicot? Veins branch outward Angiosperm Life Spans • Three Life Span Types: • 1) Annuals – Seed grows… – Produce flowers & seeds… – Die • 2) Biennials – 1st year: • Seed grows and stores food – 2nd year: • grows more… • makes flowers & seeds… • dies • 3) Perennials – Live for more than 2 years – May take decades to grow fruit Flowers petals sepals • Reproductive structure of angiosperms • Sepals – outer ring of leaves – protection • Petals – Inner ring of leaves – Brightly colored to attract pollinators • Male and female organs found inside Tulip Pistil and Stamen female male Lily Pistil and Stamen female male Pistil and Stamen female male Pistil and Stamen female male Flowers • Male Stamen – Anther: produces pollen • Female Carpel/Pistil – Inner most part – Ovary: within the base • Contains eggs • Grows into fruit when fertilized – Stigma: sticky tip, collects pollen Self-Pollination (own pollen fertilizes own egg) ... Cross-Pollination (pollen of one, fertilizes egg of another) . .. Angiosperm Life Cycle 1) Pollen sticks to animal or Here an apple tree….lets zoom into an individual flower. released intoiswind 2) Insect flies away covered in pollen ...... . ......... ...... Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen . .. .. .. .. . . . Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary . Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary 5) Nucleus travels down pollen tube to fertilize egg . Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary 5) Nucleus travels down pollen tube to fertilize egg 6) Zygote hardens into seed…flower starts to die ovary . seed . Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary 5) Nucleus travels down pollen tube to fertilize egg 6) Zygote hardens into seed…flower starts to die 7) Ovary grows into a fruit (seeds insides) ovary Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary 5) Nucleus travels down pollen tube to fertilize egg 6) Zygote hardens into seed…flower starts to die 7) Ovary grows into a fruit (seeds insides) Angiosperm Life Cycle 1) Pollen sticks to animal or released into wind 2) Insect flies away covered in pollen 3) Insect comes across another flower and spreads the pollen 4) Pollen tube grows towards ovary 5) Nucleus travels down pollen tube to fertilize egg 6) Zygote hardens into seed…flower starts to die 7) Ovary grows into a fruit (seeds insides) A few hours later… seed Seedling begins to grow… seed Years later…. HW: Bring a flower and leaf to school. One with distinct male and female parts. End of the Semester! Kobe Kuiz 1) What is the reproductive structure of angiosperms called? 2) What structure protects the seeds of angiosperms? 3) Why are flowers and fruits often brightly colored? 4) Be able to identify the parts of a flower diagram. 5) Which flower part produces pollen? 6) Which flower part will pollen land upon? 7) Which flowers only live for 2 years and then die? 8) Practice the monocot/dicot sample questions.
