B1.5-Plants and Photosynthesis

Photosynthesis- Carbon Dioxide+Water - Glucose+Oxygen.

Photosynthesis-A chemical reaction that take place in the chloroplast and combines Water & Co2 to produce Oxygen.

Chlorophyll-A green pigment-Absorbs light.

Chloroplast-Where photosynthesis takes place.

Stomota-Allows movement of gases.

Starch-Polysaccharide.

Limiting Factors-Enviromental factors which limits growth and rate of reactions.

Sucrose-Crystalline sugar found in plants.

Parlisade Cell-A layer of columnar cells rich in chloroplast-Photosynthesis occurs.

Guard Cells-Cotrols opening and closing of the stomata.

Nitrates-Formed by bacteria-Makes protein-Contains compounds.

Parlisade Layer-Contain cells packed with chloroplast for photosynthesis.

Spongy Layer-Contains large air spaces to allow gas exchange.

Air Space-Allows gas exchange.

Pholem-Transports sugar.

Xylem-Transports water.

Cuitcle-Waxy waterproof layer to reduce water loss.

1:Boil leaf for 1 minute to kill it.

2:Place the leaf in warm ethanol for 10 minutes to remove the chlorophyll.

3:Place the leaf in water for 1 minute to soften it.

4:Spread on white tile add Iodine to test for the presence of starch.

Positive result-Blue/black-Starch.

Negative result-Yellow/Orange-No starch.

Light-CO2  or temperature is  limiting.

CO2-Light or temperature is limiting.

Temp-More kinetic energy fast rate-Enzymes denature-Decrease.

Good Luck.