Plant biology

510 views

Published on

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
510
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
8
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Plant biology

  1. 1. Kingdom Plantae
  2. 2. What Is a Plant? Multicellulareukaryotes that are photosynthetic autotrophs Cell walls made of cellulose Store surplus carbohydrates as starch Mostly terrestrial
  3. 3. Obstacles Plants Overcome Absorb Minerals Conserve Water – Cuticle – Stomata – Guard Cells Reproduce on Land
  4. 4. A Vascular System Enables Plants to Thrive on Land Most plants need a “plumbing” system to transport water, minerals and nutrients. This system is known as the VASCULAR SYSTEM.
  5. 5. Divisions of Living Plants Are Divided into Nonvascular and Vascular There are 3 divisions of nonvascular plants – Hepatophyta – the Liverworts • Simplest of plants (gametophytes are dominate • Flat leafy body lacking cuticle, stomata, roots, stems or leaves – Anthocerophyta – the Hornworts • Dominate gametophyte and have stomata – Bryophyta – the mosses • Small, most have simple vascular tissue • Sporophyte with slender stalk and spore capsule • “leafy” green gametophyte that lacks roots, stems and leaves
  6. 6. Alternation Of Generations Occurs in life cycle of all plants One generation is a multicellular haploid condition and the next is a multicellular diploid condition
  7. 7. GametesArchegonia – Produce eggsAntheridia – Produce spermWhen water is available, sperm swim to the eggs
  8. 8. Features of Vascular PlantsDominate sporophyteSpecialized conducting cellsDistinctive body form – Meristem • Shoots • Roots
  9. 9. Life Cycle of a Fern
  10. 10. Evolution of the SeedThere are 5 phyla of living seed plants. Four of these phyla are collectively known as GYMNOSPERM.The other phyla is ANGIOSPERMS.
  11. 11. Seed plants produce two kinds of gametophytes. – Microgametophyte – produce male – Megagametophyte – produce female – These develop from a megaspore within the ovule.A pollen grain consists of only a few haploid cells surrounded by a thick protective wall.
  12. 12. PollinationWindInsectsanimals

×