Regents Biology Photosynthesis: Life from Light and Air

Regents Biology 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 ___________________

Regents Biology Photosynthesis This is the equation you are used to seeing, but this is not the whole story… + water + energy  glucose + oxygen carbon dioxide 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy  +++

Regents Biology How do plants live?  ______________________  ____________________________  collect sun energy  make ATP  ____________________________  use ATP for energy  use CO 2 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

Regents Biology Photosynthesis  Actually 2 separate reactions  ______________________  use sunlight  make energy (ATP)  ______________________  use ATP  use CO 2  make sugars (C 6 H 12 O 6 ) sun ATP ADP CO 2 sugar Energy building reactions Sugar building reactions

Regents Biology CO 2 Chloroplasts Leaf Chloroplast _____________ _____________ _____________ Chlorophyll

Regents Biology Energy Building Reactions O2O2 H2OH2O Energy Building Reactions sunlight ATP H2OH2O O2O2 light energy  ++  _________________  _________________ _________________

Regents Biology Sugar Building Reactions sugars C 6 H 12 O 6 CO 2 Sugar Building Reactions ATP CO 2 C 6 H 12 O 6 ADP ATP  ++ ADP  ____________  ____________ ____________ ____________ ____________ ____________

Regents Biology Putting it all together sugars C 6 H 12 O 6 CO 2 ATP ADP H2OH2O O2O2 sunlight CO 2 H2OH2O C 6 H 12 O 6 O2O2 light energy  +++ Sugar Building Reactions Energy Building Reactions _______________  ____________

Regents Biology  Bring In  ___________  Let Out  ___________  Move Around  ___________ So what does a plant need? 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy  +++ roots shoot leaves

Regents Biology Leaf Structure photosynthesis  _____________ ______ O2O2 H2OH2OCO 2 O2O2 __________ H2OH2O ______________

Regents Biology Stomates  ______________________  _______________ guard cell stomate

Regents Biology

Xylem ______________________

Regents Biology Phloem: food-conducting cells  ____________________ ____________________ ____________________  __________________

Regents Biology 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

Regents Biology How are they connected? glucose + oxygen  carbon + water + energy dioxide C 6 H 12 O 6 6O 2 6CO 2 6H 2 OATP  +++ Respiration + water + energy  glucose + oxygen carbon dioxide 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy  +++ Photosynthesis

Regents Biology H2OH2O Energy cycle Photosynthesis Cellular Respiration sun The Great Circle of Life! Where ’ s Mufasa? O2O2 CO 2 ____________________ ATP

Regents Biology 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 Then all the cats, dogs, mice, people & elephants… are really strands of air woven together by sunlight! sun air

Regents Biology Any Questions??