Photosynthesis : Photosynthesis
Sunlight provides energy to all living things directly or indirectly : Sunlight provides energy to all living things directly or indirectly Plants obtain energy directly from sunlight
Herbivores gets it indirectly by eating plants
Carnivores also get it indirectly by eating other animals .
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Slide 7 : Autotroph:
An Organism that can make its own food
Heterotroph:
An Organism that can not make its own food
Photosynthesis : Photosynthesis Cell captures energy in sunlight and uses it to make food.
Cells use Carbon Dioxide and water and produce oxygen and sugars
It can be divided into two stages
Stage 1- Capturing Sun’s Energy : Stage 1- Capturing Sun’s Energy Leaves capture sun’s energy
Leaf cells have chloroplast
Chloroplasts have green photosynthetic pigment chlorophyll
Chlorophyll traps sun’s energy
Stage 2 Using energy to make food : Stage 2 Using energy to make food Water And carbon dioxide undergo series of chemical reactions inside chloroplasts
The reactions are powered by sun’s energy captured by chlorophyll
This produces sugars and oxygen
Slide 11 : Carbon dioxide enters the plant through small openings on the underside of the leaves called Stomata
Oxygen a product of Photosynthesis also exits the leaf through the Stomata
The Photosynthetic Equation6CO2+ 6H2O?C6H12O6 +6O2 : The Photosynthetic Equation6CO2+ 6H2O?C6H12O6 +6O2 Carbon dioxide Water sugar oxygen
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Slide 14 : What Happens to the Sugar Produced in Photosynthesis
Plant cell use some of the sugar for food, the cell breaks down the sugar molecule to give energy
Some sugar molecules are converted into other compounds like cellulose
Some sugar molecules may be stored in the Plant’s cell for later use