Module 12-4 Plant structure and function

4. how a plant manufactures its own food by absorbing carbon dioxide and reduces oxygen.
9. give leaves their green color.
10. the evaporation of water from plants.
11. Greek for little mouth, tiny holes on the underside of most leafs and essential for survival allowing the exchange of gasses with the atmosphere.
13. layer of cells that block xylem and phloem running through the petiole of the leaf as days get shorter.
14. often grown on the epidermis of a leaf that does not secrete cuticle as a defense mechanism, and giving a velvety appearance.
16. streaming keeping chloroplasts in constant movement directing them towards the top of the cell to receive sunlight.
19. have yellow or orange hues responsible for the color of pumpkins, carrots and corn.

1. acid produced from the breakdown of plant cell contents giving dead leaves their brown color.
2. breaking down large molecules by adding water.
3. oval shaped cells rich in chloroplasts thus making them the site of photosynthesis.
5. pressure that keeps leaves and stem stiff and why they wilt when deprived of water, and why some flowers open their petals during the day and close them at night.
6. living thick-walled cells that support the veins until they get very small.
7. single layer of cells covering the top and bottom of a leaf and protecting the inner parts.
8. plants that lose their leaves for the winter to conserve water.
9. waxy substance sometimes secreted by the epidermis and giving the leaf a shiny appearance.
12. plant movement due to a preprogrammed response
15. flanked by 2 guard cells to open and close it.
17. influences leaf color.
18. mesophyll tissue where cells can absorb carbon dioxide for photosynthesis.