1. Land Plant Problems Plants Invade the Land

2. Plants invade the Land Green Algae  Land Plants Kingdom ProtistaKingdom Plantae PhotosyntheticPhotosynthetic Multicellular Live in waterLive on land

3. Problems Land Plants Need to Solve 1.How to Prevent Dehydration? Answer = cuticle waxy covering

4. Problems Land Plants Need to Solve 2. How to do Gas Exchange? (CO 2 in, O 2 out) Answer: Stomata* *Also release excess water stoma Guard cell

5. Stomata Solve another Problem  Open & close to control water loss Open Closed

6. Problems Land Plants Need to Solve 3. How to Get Nutrients from Land? Answer: Roots

7. Problems Land Plants Need to Solve 4. How to have Reproduction NOT dependent on water? a. Make pollen (plant sperm that won’t dry out)

8. Problems Land Plants Need to Solve 4. How to have Reproduction NOT dependent on water? b. Find ways to disperse pollen: wind, insects, birds, small mammals

9. Problems Land Plants Need to Solve 4. How to have Reproduction NOT dependent on water? c. Keep developing embryo from drying out with seed coat