Chap 29 plant diversity-1-st-09

Chap 29 plant diversity-1-st-09 - Plant diversity-1 Ozone...

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Plant diversity-1 Ozone protected from UV rays Developed underwater Bryophytes- dependent on water Ferns- not dependent, but prefers humidity 2 resources on land: Subterranean [soil]- developed roots Air- developed shoot system All plants are monophyletic, came from algae (no direct fossil record)
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Adaptations for life on land Cuticle - non cellular waxy layer secreted by the outermost layer of leaf [epidermis], prevents water loss, protects against microbial attack Gametangia - structures that enclose plant gametes, prevents decay/drying and microbial attack [bacterial/fungal infection] Protected Embryo- Pigments & Secondary Compounds [metabolites, prevent microbial attack and herbivory]- for protection against UV damage [flavonoids]
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Four major periods of plant evolution Seeds increase adaptation by protecting embryo Flowers attract pollinators, they can spread Domination of sporophyte in ferns, angiosperms, gymnosperms
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This note was uploaded on 11/06/2011 for the course BIL 160 taught by Professor Krempels during the Spring '08 term at University of Miami.

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Chap 29 plant diversity-1-st-09 - Plant diversity-1 Ozone...

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