1 / 18

Chapter 6 Photosynthesis

Chapter 6 Photosynthesis. Where do organisms get energy?. Nearly all organisms depend on solar energy (sunlight) being converted into chemical energy. Sun: start of all energy Producers/Autotrophs: convert solar energy into simple sugars. . What are autotrophs and heterotrophs?.

damian
Download Presentation

Chapter 6 Photosynthesis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 6 Photosynthesis

  2. Where do organisms get energy? • Nearly all organisms depend on solar energy (sunlight) being converted into chemical energy. • Sun: start of all energy • Producers/Autotrophs: convert solar energy into simple sugars.

  3. What are autotrophs and heterotrophs? • Autotrophs-organisms that can make their own food (producer) • Heterotrophs- organisms that can’t make their own food (consumer)

  4. What is Photosynthesis? • Photo=Light Synthesis=to make • The process which takes place in green plants where glucose and oxygen are made from sunlight

  5. What is the photosynthesis equation? H2O+CO2+sunlight ---> C6H12O6+O2 (Water) (carbon dioxide) (Glucose) (Oxygen)

  6. Where exactly does photosynthesis take place? • In the chloroplasts in the leaves

  7. Where exactly does photosynthesis take place? • Stroma: aqueous space in chloroplast • Thylakoid: site of the light-dependent reactions of photosynthesis • Grana: stack of thylakoids

  8. Where are the pigments found in chloroplasts? • Chlorophyll a- Directly involved in the light reaction • Accessory Pigments- chlorophyll b, carotenoids, xanthophyll • Absorb the wavelengths that are reflected from Chlorophyll a

  9. What happens in photosynthesis?

  10. What happens in the light reactions of photosynthesis? • Many steps where the light excites electrons which are then moved down an electron transport chain producing molecules of NADPH and ATP. • Also 02 is released

  11. What happens during the dark reactions or the Calvin Cycle? • Uses the energy stored in ATP and NADPH to attach carbon atoms in organic compounds such as glucose, amino acids, and lipids. • Glucose is combined to form carbohydrates • Amino acids are combined to form proteins

  12. What is the anatomy of a Leaf? • Cuticle-outer waxy layer of leaf; decrease water loss • Epidermis-upper and lower layer; protect leaf • Mesophyll-middle layer of leaf-chloroplasts; carry out photosynthesis • Vein-Tubes for transport of food and water; carry food and water through plant

  13. What is the anatomy of a Leaf? • Stoma-opening in the lower epidermis where gases pass through; allow gases to go in and out of the leaf • Guard Cells-Surround the stoma and regulate the opening and closing of the stoma; regulate opening and closing of stomata

  14. How do the reactants get into the plant? • CO2 enters the plant through the stoma in the leaves • H2O rises to the leaves through veins after being absorbed by roots • Sunlight diffuses through the cuticle and epidermis into mesophyll cells. Photosynthetic rate increases or decreases depending on the amount of reactants available.

  15. See the Process in Action! • http://highered.mcgraw-hill.com/sites/0072437316/student_view0/chapter10/animations.html

More Related