PLANTS!

Overview of Plants Are plants multicellular or unicellular? Multicellular Eukaryotic or Prokaryotic? Eukaryotic Of what is their cell wall composed? Cellulose How do they obtain nutrition? Autotrophs

Plant Cell Structure Nucleus Chloroplast Cell Wall Vacuole

Plant Evolution Flowers Bryophytes (Mosses) Vascular System Seeds Gymnosperms (Conifers) Pteridophytes (Ferns) Angiosperms (Flowering Plants) Common Ancestor?

Algae: Is it a Plant? - courtesy of Mike Guiry

Bryophytes - Nonvascular Plants - early land plants, no vascular system. Contains Spores Rhizoid (not a true root) Ex. Mosses, liverworts Without a vascular system, they can not support roots, stems, and leaves.

Pteridophytes - Primitive Vascular Seedless Have vascular tissue Can support roots, stems, leaves Size varies greatly Rely on water for reproduction – Ex: Ferns, club mosses, horsetails

Gymnosperms – Seed Plants Female Cone Male (Pollen Cone) Have vascular tissue Can support roots, stems, leaves Size varies greatly Have pollen to reproduce away from water Have “naked” seeds produced in cones Ex: Redwood, Spruce, Pine

Angiosperms – Flowering Plants Have vascular tissue Can support roots, stems, and leaves Size varies greatly Have pollen to reproduce away from water Have flowers to surround and protect the seeds and to attract pollinators Most diverse and widespread group of land plants Have covered seeds dispersed in fruit Ex: Rose, cucumber, tomato