1 / 29

Understanding Angiosperms: The Life Cycle and Characteristics of Flowering Plants

Angiosperms, or flowering plants, are vital to the ecosystem due to their reproductive structures that attract pollinators and produce fruit for seed protection and dispersal. They exhibit diverse life spans categorized into annuals, biennials, and perennials. Angiosperms are classified into two groups based on seed type: monocots (one seed leaf) and dicots (two seed leaves). Each flower contains male (stamen) and female (pistil) reproductive organs, and they undergo processes like self-pollination and cross-pollination. The double fertilization process leads to seed and fruit development, completing the life cycle.

jonah-saunders
Télécharger la présentation

Understanding Angiosperms: The Life Cycle and Characteristics of Flowering Plants

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Group 4: Flowering Plants 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. Endosperm (Food supply)

  2. 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

  3. 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

  4. Monocots vs. Dicots Know this one Know this one Know this one ehh Know this one

  5. Apple Tree: Monocot or Dicot? 2 3 1 Net-like veins 4 5

  6. Monocot or Dicot? 2 3 1 4 6 5

  7. Monocot or Dicot?

  8. Monocot or Dicot?

  9. Monocot or Dicot? Veins run parallel

  10. Monocot or Dicot? Veins run parallel

  11. Monocot or Dicot? Veins branch outward

  12. 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

  13. 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

  14. Tulip Pistil and Stamen female male

  15. Lily Pistil and Stamen female male

  16. Pistil and Stamen female male

  17. Pistil and Stamen female male

  18. Flowers • Male Stamen • Anther: produces pollen (sperm) • Female Carpel/Pistil • Inner most part • Ovary: within the base • Contains eggs • Grows into fruit when fertilized • Stigma: sticky tip, collects pollen

  19. Self-Pollination(own pollen fertilizes own egg) . . .

  20. Cross-Pollination(pollen of one, fertilizes egg of another) . . .

  21. Angiosperm Life Cycle 1. Pollen sticks to animal (pollinator) or is released into wind.

  22. 1. Pollen sticks to animal (pollinator) or is released into wind.

  23. 2. Animal (pollinator) finds new flower to feed on & pollen grains land on the stigma = pollination 3. Pollen tube grows towards the ovary and 2 nuclei transfer down into the ovule .. Let’s zoom in egg

  24. 4. Angiosperms go through the process of double fertilization. • 1 sperm fuse with the egg = zygote • 1 sperm fuse with the polar nuclei = triploid (3n) endosperm Double Fertilization Endosperm (3n) Zygote

  25. Endosperm Seed Coat Embryo 5. Each ovule becomes a seed. 6. The surrounding ovary grows into a fruit.

  26. 7. Flower dries up and fruit falls to ground.

  27. 8. Animals eat fruit….seeds come out the other end…

  28. 9. Seeds get dispersed. 10. Seed germinates (sporophyte), and the cycle starts over. Ground

More Related