1. Autotrophic Nutrition
Definition:
when an organism makes (synthesizes) its own food using substances from the environment
H2O, CO2
glucose
“Changing light energy to chemical energy” 1

2. Importance of Photosynthesis:
process used by some organisms to
make their own food by using sunlight
Ex. plants, algae
Importance of Photosynthesis:
food for plant
food for animals that eat the plant
O2 for other organisms 2

3. chloroplasts Location of Photosynthesis: leaves
Occurs in plant (large surface area to absorb light) in cell organelles called
leaves
chloroplasts

4. Photosynthesis Chemical Reaction
Happens in the
chloroplast
CO2 + H2O C6H12O6 + H2O + O2
Carbon dioxide water glucose water oxygen
Inorganic reactants
Organic products 4

5. Leaf Structures
Remember, this is where PHOTOSYNTHESIS takes place; in the chloroplast of the leaf cells!
outer surface of leaf
waxy layer to protect against water loss
pores (openings) in bottom of leaf
allow O2, H2O and CO2 in and out
regulated by guard cells
Guard cells- cells that swell or deflate to open/close stomates
layer w/most chloroplasts
most photosynthesis takes place here
under epidermis
Epidermis-
Cuticle-
Stomates-
Stomate clip
Guard cells-
Palisade layer-
Maintain homeostasis by REGULATING water loss
& gas exchange 5

6. - organelles that contain chlorophyll
Chloroplasts
- organelles that contain chlorophyll
air spaces in the leaf for CO2 and O2 exchange
tubes that contain xylem and phloem for transport of water and food in plant
What laboratory technique could we use to separate the colors that make up chlorophyll??
chromatography
Spongy layer-
Veins- 6

8. Leaf Diagram 8

9. What affects Photosynthesis?
sun
temperature
water
CO2
As CO2 ____in plants, photosynthesis ______.
As light ______ in plants, photosynthesis ________
As amount of water ______ in plants, photosynthesis _______
Venus fly trap