Photosynthesis: Life from Light and Air

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Photosynthesis Life from Light and Air
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Energy needs of life

• All life needs a constant input of energy
• __________________________
• get their energy from eating others
• eat food other organisms _________________
• make energy through __________________
• __________________________
• get their energy from self
• __________________________________________
• __________________________________________
• make energy through ___________________

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Photosynthesis

• This is the equation you are used to seeing, but
  this is not the whole story

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How do plants live?

• ______________________
• ____________________________
• collect sun energy
• make ATP
• ____________________________
• use ATP for energy
• use CO2 as carbon for new sugars
• build sugars
• glucose, cellulose, starch
• build all other organic molecules
• proteins, lipids, carbohydrates, DNA
• store energy for future use
• starch in seeds roots

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Photosynthesis

• Actually 2 separate reactions
• ______________________
• use sunlight
• make energy (ATP)
• ______________________
• use ATP
• use CO2
• make sugars (C6H12O6)

Energybuilding reactions
ATP
ADP
Sugarbuilding reactions
sugar
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Chloroplasts
__________________________
Leaf
Leaf
Chloroplasts
Chlorophyll
Chloroplast
_____________ _____________
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Energy Building Reactions
light energy
?
H2O
O2


ATP
H2O

• _________________
• __________________________________

sunlight
Energy Building Reactions
ATP
O2
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Sugar Building Reactions
?
CO2
ADP


C6H12O6
ATP

• ____________
• ____________
• ____________ ____________ ____________
  ____________ ____________

CO2
ADP
SugarBuilding Reactions
ATP
sugars C6H12O6
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Putting it all together
H2O
CO2

• _______________
• ____________
• ____________

sunlight
ADP
SugarBuilding Reactions
Energy Building Reactions
ATP
sugars C6H12O6
O2
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So what does a plant need?

• Bring In
• ___________
• ___________
• ___________
• Let Out
• ___________
• Move Around
• ___________

leaves
shoot
roots
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Leaf Structure
______________
photosynthesis
______________
O2
H2O
CO2
__________
____________

• _____________
• _____________

O2
H2O
CO2
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Stomates

• ______________________
• _______________
• _______________
• _______________

guard cell
stomate
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(No Transcript)
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Xylem
______________________
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Phloem food-conducting cells

• __________________________________________________
  __________
• __________________
• __________________
• __________________

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Putting it all together

• Making a living
• _____________________
• leaves solar collectors
• photosynthesis
• _____________________
• stomates gases in out
• _____________________
• roots take in water from soil
• pulled up by leaf evaporation
• _____________________
• roots take in from soil

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How are they connected?
Respiration
Photosynthesis
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Energy cycle
Photosynthesis
____________________
CO2
O2
____________________
Cellular Respiration
ATP
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The poetic perspective

• All of the solid material of every plant was
  built out of thin air
• All of the solid material of every animal was
  built from plant material

sun
Then all the cats, dogs, mice, people
elephantsare really strands of air woven
together by sunlight!
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Any Questions??