Regents Biology 2006-2007 Regents Biology Photosynthesis: Life from Light and Air.
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Transcript of Regents Biology 2006-2007 Regents Biology Photosynthesis: Life from Light and Air.
Regents Biology
Plants are energy producers Like animals, plants need energy to live
unlike animals, plants don’t need to eat food to make that energy
Plants make both FOOD & ENERGY animals are consumers plants are producers
Regents Biology
How do plants make energy & food? Plants use the energy from the sun
to make ATP energy to make sugars
glucose, sucrose, cellulose, starch, & more
sun
ATP
sugars
Regents Biology
H2O
Building plants from sunlight & air Photosynthesis
2 separate processes ENERGY building reactions
collect sun energy use it to make ATP
SUGAR building reactions take the ATP energy collect CO2 from air &
H2O from ground use all to build sugars
ATP
sun
sugars
+
carbon dioxide
CO2
sugarsC6H12O
6
CO2
water
H2O+
Regents Biology
Using light & air to grow plants
6CO2 6H2O C6H12O6 6O2sun
energy+ ++
glucose + oxygencarbondioxide
sunenergy+ water +
(ATP) = used to build the sugar
Photosynthesis using sun’s energy to make ATP using CO2 & water to make sugar in chloroplasts allows plants to grow makes a waste product
oxygen (O2)
Regents Biology
What do plants need to grow? The “factory” for making
energy & sugars chloroplast
Fuels sunlight carbon dioxide water
The Helpers enzymes H2O
sugars
ATP
Make ATP!Make sugar!
I can do it all…And no one
even notices!
enzymes
CO2
sun
Regents Biology
H2O
Photosynthesis
ENERGYbuilding reaction
s
SUGARbuilding reaction
s
ATPADP
CO2
sugar
sun
used immediatelyto synthesize sugars
Regents Biology
Chloroplasts
Chloroplastsin cell
Leaf
Leaves
Chloroplast
absorbsunlight & CO2
makeENERGY & SUGAR
Chloroplastscontain
Chlorophyll
CO2
Chloroplast
sun
Regents Biology
Bring In light CO2
H2O Let Out
O2
Move Around sugars
So what does a plant need?
6CO2 6H2O C6H12O6 6O2light
energy + ++
roots
shoot
leaves
Regents Biology
Leaf Structure
phloem (sugar)xylem (water)
stomate
palisadeslayer
spongylayer
cuticleepidermis
guardcells
cuticleepidermis
vascular bundle (vein)
Regents Biology
Transpiration
H2O CO2
CO2
O2 H2O
xylem (water)
stomate guardcells
O2
CO2 in O2 out water out
so it gets to leaves from roots
Regents Biology
Transpiration Water evaporates from
the stomates in the leaves pulls water up from
roots water molecules stick
to each other more water is pulled
up tree from ground
Regents Biology
Function of Leaf Structures Cuticle
waxy coating reduces water loss Epidermis
skin protecting leaf tissues Palisades layer
high concentration of chloroplasts collecting sun’s energy
photosynthesis making ATP & sugars
Spongy layer air spaces
gas exchange CO2 in for sugar production, remove waste O2
Regents Biology
Stomates & Guard Cells Function of stomates
CO2 in O2 out H2O out
gets to leaves for photosynthesis Function of guard cells
open & close stomatesguard cell
stomate
Regents Biology
Guard cells & Homeostasis Homeostasis
keeping the internal environment of the plant balanced
Stomates open let CO2 in
needed to make sugars let H2O out
needed for photosynthesis let O2 out
get rid of waste product
Stomates close if too much H2O evaporating
Regents Biology
Phloem: food-conducting cells
carry sugars around the plant wherever they are needed new leaves fruit & seeds roots
Regents Biology
How are they connected?
glucose + oxygen carbon + water + energydioxide
C6H12O6 6O2 6CO2 6H2O ATP+ + +
Respiration
Photosynthesis
6CO2 6H2O C6H12O6 6O2light
energy + ++
glucose + oxygencarbondioxide
sunenergy+ water +
Regents Biology
H2O
Energy cycle
Photosynthesis
Cellular Respiration
sun
The Great Circleof Life!Mufasa?
glucosesugars
O2CO2
plants
animals, plants
ATP
Regents Biology
H2O
Another view…
Photosynthesis
Cellular Respiration
sun
organicmolecules
food
O2CO2
producers, autotrophs
consumers, heterotrophs
synthesis
capturelight energy
digestion
releasechemical energy ATP
wastewastewaste
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!
sunair