Tracheophyta : the seed plants

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Tracheophyta : the seed plants. Two different kinds. Gymnosperms: have an unprotected seed (naked in cone like structures) Angiosperms: seeds are enclosed and protected inside a fruit. Adaptations of seed plants. Can reproduce without water (wind or other creatures can carry genetic material)
Transcript
Tracheophyta: the seed plantsTwo different kinds
  • Gymnosperms: have an unprotected seed (naked in cone like structures)
  • Angiosperms: seeds are enclosed and protected inside a fruit
  • Adaptations of seed plants
  • Can reproduce without water (wind or other creatures can carry genetic material)
  • There are separate male and female gametophytes
  • Gymnosperms
  • Have thin, needle like leaves (covered by a waxy cuticle)
  • Roots extend over a wide surface area to hold the tree firmly in one place and access a lot of nutrients/water from the soil
  • Tend to live in colder/harsher climates
  • Ex: Evergreen trees!
  • Angiosperms
  • Have flowers (known as flowering plants) for attracting pollinators (like insects or birds)
  • Flowers have both male and female structures
  • Male (Stamen):
  • Anther :produces pollen
  • Filament: thin stalk that holds anther out of the flower
  • Female (Carpel/Pistil)
  • Stigma: where pollen gets deposited
  • Style: a slender stalk leading from stigma to the ovary
  • Ovary: contains ovule (egg cell)
  • Make sure you know the life cycles of seed plantspg 266 and pg 269Coevolution
  • Some specific insect or animals are attracted to the nectar in specific flowers (and will thus pollinate them)
  • It is believed they evolved together: plant feeding insect while insect helps plant reproduce
  • Madagascar hawkmoth and orchid
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