plant diversity chapter 20. why are plants important? mm edicine ff ood cc onvert abiotic to biotic...
TRANSCRIPT
Why are plants important? Medicine
Food
Convert abiotic to biotic
Create habitats
Modify the climate
Stabilize the soil
What adaptations allowed plants to come on to land?
Pollen grain
Cuticle
Stomata
mycorrhizae
Vascular tissue
Xylem
phloem
BryophytesMoss, liverworts, hornworts
First land plants
No true roots, stems, or leaves
Contain no vascular tissue
Rhizoids instead of roots
Gametophyte is the dominant generation
Require water for reproduction
FernsSpore Bearing Plants
Contains vascular tissueContains vascular tissue
Evolved 350 million years agoEvolved 350 million years ago
Live in moist, acidic environmentsLive in moist, acidic environments
Created coal depositsCreated coal deposits
Sporophyte dominant generationSporophyte dominant generation
Gymnospermsconifers, cycads, ginkgos
Most ancient of the seed plants
Seeds lack protective outer coating
Conifers- evergreens
Live in sandy soil, in a cool moist environment
Roots spread out over a large shallow area
Needlelike leaves covered with a thick waxy cuticle