plants…an overview!. importance of plants: agricultureprevention of soil erosion medicinesmental...

Plants…an Overview!

Importance of Plants:Agriculture Prevention of Soil Erosion

Medicines Mental Health

Clothing & Dyes Climate Control

Fuels Tourism

Decoration & Privacy Hobby

Classifying Plants:

-Aquatic or Terrestrial-Prevention of Water Loss-Spores or Seeds-Vascular or Nonvascular

Nonvascular Plants:-mostly terrestrial-produce spores-need water to reproduce-very small plants

Phyla:Bryophyta…mossesHepatophyta…liverwortsAnthocerophyta…hornworts

Vascular Seedless Plants:-have xylem and phloem-spores-can grow largerthan nonvascular plants

Phyla:Psilophyta…whisk fernsLycophyta…club mossesSphenophyta…horsetailsPteridophyta…ferns

Vascular Seed Plants:-Gymnosperm Angiosperm-have xylem and phloem-seeds (unprotected vs. protected)-nonflowering & flowering-can grow largerthan nonvascular plants

Phyla:Cycadophyta…Cycads (gymnosperm)Ginkgophyta…Gingkoes (gymnosperm)Coniferophyta…Conifers (gymnosperm)Gnetophyta…Cone-bearing, odd (gymnosperm)Anthophyta…Flowering (angiosperm)

Major Plant Structures:1. Roots

-Tap-Fibrous-Adventitious

-Root Hairs

2. Stems-woody-herbaceous

-stolons-tubers-fleshy

3. Leaves-guard cells-stomata

4. Flowers-pollination-fertilization-seeds and fruits