Vascular plants: FERN and FERN ALLIES

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Vascular plants: FERN and FERN ALLIES. Tracheophytes : The Vascular Plants. xylem (for transporting water and mineral nutrients) phloem (for transporting sugars from leaves to the rest of the plant) larger and more complex sporophyte is more prominent - PowerPoint PPT Presentation

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  • Tracheophytes: The Vascular Plantsxylem (for transporting water and mineral nutrients)phloem (for transporting sugars from leaves to the rest of the plant)larger and more complexsporophyte is more prominent demonstrate increased levels of organization

  • Major evolutionary advances of the vascular plants

  • Major evolutionary advances of the vascular plants

  • Major evolutionary advances of the vascular plants

  • Division Lycophyta: club mossesoldest extant group of vascular plantssporangia organized into strobili (sing.: strobilus)may be either HOMOSPOROUS or HETEROSPOROUSLeaves that contained vascular tissue

  • REPRESENTATIVE SPECIES Lycopodium isosporesbisexual gametophyte

  • REPRESENTATIVE SPECIESSelaginella small spores (microspores) that germinate to produce the male gametophytelarger spores (megaspores) that germinate to produce the female gametophyte

  • Division Sphenophyta: scouring rushes leaves produced at a node (WHORLS)production of isospores spores bearing elaters (devices to aid in spore dispersal)gametophyte is small, photosynthetic and free-livingSilica concentratedjointed stems

  • Division Psilophytatraditionally considered to be the oldest living lineage of vascular plantslack roots stem is photosyntheticno leaves but rather minute enations

  • sporangia occur in fused groups (synangia)bilobed synangia of Tmesipteristrilobed synangia of Psilotumresembles what paleobotanists believe Cooksonia

  • CHARACTERISTICS:1. Underground rhizome2. Unicellular rhizoids3. Erect stems dichotomize into the main photosynthetic organ

  • REPRESENTATIVE speciesPsilotum (2 species) and Tmesipteris (2-5 species)

  • Division Pteridophytareproduce by spores from which the free-living bisexual gametophyte generation developsmegaphyllous leavesleaf is called a frondfiddleheadscentral axis of a compound frond is called the rachis

  • ANTHERIDIUMARCHAEGONIUM

  • READING ASSIGNMENTREAD ON GYMNOSPERMS AND ANGIOSPERMSYou may also use Biology by Campbell and Reece