Photosynthesis

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autotroph
- make their own food
- ex. plants- chlorophyll
- use light energy to create foods and produce energy
Heterotroph
- cannot create their own food
- cannot directly use the sun's energy
Photosynthesis Goal
- to create glucose
- photosynthesis:
- anabolic- small molecules combine
- endergonic- energy enters
Equation

6CO₂+ 6H₂O + sunlight energy ---> C₆H₁₂O₆+ 6O₂+ 6H₂O
location
- chloroplast
- leaves
Stoma
- pores
- stomata(pl.)
- water and vapor gases (CO2 and O2) are exchanged between plant/atmosphere
- underside of leaf
- CO2 enters, water and oxygen exit
Mesophyll Cells
- vacuole, cell wall, cell membrane, chloroplast
- chloroplast
- double membrane: 1. outer smooth 2. inner
chloroplast
chlorophyll
- pigment that absorbs blue/red wavelengths and reflects green wavelengths
- plants are green b/c green wavelength is reflected not absorbed
- Chlorophyll A/B
Chlorophyll A/B

slightly different in structural makeup
Wavelengths

plants are comfortable on the ends of the spectrum; blue/red
What causes leaves to change colors in the fall?