Download presentation
Presentation is loading. Please wait.
Published byReynold Thomas Modified over 8 years ago
2
Regents Biology 2006-2007
3
Regents Biology 2006-2007 Photosynthesis: Life from Light and Air
4
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
5
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
6
Regents Biology H2OH2O 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 CO 2 from air & H 2 O from ground use all to build sugars ATP sun sugars + carbon dioxide CO 2 sugars C 6 H 12 O 6 CO 2 water H 2 O +
7
Regents Biology Using light & air to grow plants 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 sun energy +++ glucose + oxygen carbon dioxide sun energy + water + (ATP) Photosynthesis using sun energy to make ATP using carbon dioxide & water to make sugar in chloroplast allows plants to grows makes a waste product oxygen
8
Regents Biology What do plants need to grow? The “factory” for making energy & sugars chloroplast Fuels sunlight carbon dioxide water The Helpers enzymes H2OH2O sugars ATP Make ATP! Make sugar! I can do it all… And no one even notices! enzymes CO 2 sun
9
Regents Biology Photosynthesis energy building reactions sugar building reactions ATP ADP CO 2 sugar sun
10
Regents Biology Chloroplasts are only in plants animal cells plant cells
11
Regents Biology CO 2 Chloroplasts in cell Leaf Chloroplast absorb sunlight & CO 2 make energy & sugar Chloroplasts contain Chlorophyll
12
Regents Biology Bring In CO 2 H2OH2O light Let Out O2O2 Move Around sugars So what does a plant need? 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy +++ roots shoot leaves
13
Regents Biology Leaf Structure phloem (sugar) xylem (water) stomate guard cell palisades layer spongy layer cuticle epidermis
14
Regents Biology Transpiration H2OH2OCO 2 O2O2 H2OH2O xylem (water) stomate guard cell gases in & out water out O2O2
15
Regents Biology Transpiration Water evaporates from the stomates in the leaves water molecules stick to each other more water is pulled up the tree
16
Regents Biology Stomates Function of stomates CO 2 in O 2 out H 2 O out guard cell stomate
17
Regents Biology
18
Xylem carry water up from roots
19
Regents Biology Phloem: food-conducting cells carry sugars around the plant wherever they are needed new leaves fruit & seeds roots
20
Regents Biology Putting it all together Making a living… sunlight leaves = solar collectors photosynthesis gases: CO 2 in & O 2 out stomates = gases in & out H2OH2O roots take in water from soil pulled up by leaf evaporation nutrients roots take in from soil
21
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 Photosynthesis 6CO 2 6H 2 O C 6 H 12 O 6 6O 2 light energy +++ glucose + oxygen carbon dioxide sun energy + water +
22
Regents Biology H2OH2O Energy cycle Photosynthesis Cellular Respiration sun The Great Circle of Life! Where ’ s Mufasa? glucose O2O2 CO 2 plants animals, plants ATP
23
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
24
Regents Biology 2006-2007 Got the energy… Ask Questions!!
25
Regents Biology Energy needs of life All life needs a constant input of energy Animals = Heterotrophs get their energy from “eating others” eat food = other organisms = organic molecules make energy through respiration Plants = Autotrophs get their energy from “self” get their energy from sunlight build organic molecules (food) from CO 2 make energy through photosynthesis
26
Regents Biology How do plants live? Photosynthesis Energy building reactions collect sun energy make ATP Sugar building reactions 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
27
Regents Biology
28
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 +++
Similar presentations
© 2024 SlidePlayer.com Inc.
All rights reserved.