Photosynthesis and carbon cycle

Question 1

What is the equation for photosynthesis and where do the reactants come from?

Answer 1

Sunlight
Carbon dioxide + water ——————>
Chlorophyl
Glucose+ oxygen

Reactants: Water, sunlight, cared for

Question 2

Describe the function of xylem and phloem

Answer 2

Xylem carries water and minerals of the xylem tubes

Phloem, transports food

Question 3

How is starch formed in a leaf and how do you test a leaf for starts

Answer 3

Starch is formed by photosynthesis

1)Dip a leaf in water for a minute to soften it
2) Turn off bunsen burner, put the leaf into a test tube of ethanol to remove the green colour

3) Stand the test tube and a beaker of hot water for about 10 minutes

4) Watch the live in cold water, spread the leaf out flat on a petri dish And cover it with iodine solution
If the leaf goes blue, black starch is present

Question 4

Name some uses of glucose in a plant

Answer 4

Water carbon dioxide, protein oil for energy storage, Protein, starch for storage

Question 5

What do fertilisers contain and why do farmers use them?

Answer 5

Fertilisers contain Manufactured fertilisers contain mineral salts

Natural fertilisers: organic manure animal wast

Question 6

Describe the process of eutrophication

Answer 6

Fertilisers, cause lakes to become stagnant