2. Plants & Plant Systems TransportMetabolismReproduction Gas Exchange

3. 2006-2007 Transport in Plants

4. Transport in plants Vascular Tissue Vascular Tissue – Vasculature refers to the movement of nutrients and fluids through vessels – Similar to Circulatory System H 2 O & minerals H 2 O & minerals – transported in xylem Sugars Sugars – transported in phloem

5. Vascular tissue in stems dicot trees & shrubs monocot grasses & lilies collect annual rings

6. AP Biology Roots  Similar to digestive system  Roots anchor plant in soil, absorb minerals & water, & store food 2 1 3

7. Root anatomy dicotmonocot

8. AP Biology Leaves  Function of leaves  photosynthesis  energy production  gas exchange  Transpiration  Similar to Respiratory and excretory systems

9. Adapted for Photosynthesis  Leaves are usually thin  High surface area-to-volume ratio  Promotes diffusion of carbon dioxide in, oxygen out  Leaves are arranged to capture sunlight  Are held perpendicular to rays of sun  Arranged so they don’t shade one another

10. AP Biology succulent leaves Modified leaves tendrils (peas)spines (cacti) colored leaves (poinsetta)

11. AP Biology Leaves have 2 main functions 1.Collection of solar energy Chloroplasts and ChlorophyllChloroplasts and Chlorophyll 2.Gas exchange Stomata and Guard CellsStomata and Guard Cells

12. AP Biology  Both systems depend on the other  roots depend on sugars produced by photosynthetic leaves  shoots depend on water & minerals absorbed from the soil by roots Interdependent systems water & minerals sugars

13. AP Biology Reproduction  Flowers serve as the reproductive organs of plants, complete with male and female reproductive organs  How does pollen compare to gametes in animals?  Is plant reproduction sexual?

14. Putting it all together  Obtaining raw materials  sunlight  leaves = solar collectors  CO 2  stomata = gas exchange  H 2 O  uptake from roots  nutrients  uptake from roots