Photosynthesis 1
Photosynthesis 2
Photosynthesis 3
vascular bundles
vascular tissues
100
What is photosynthesis?
The process that uses light energy from the sun to make food from water and carbon dioxide.
100
What is the form of manufactured food that is produced by leaf? How is it stored?
Glucose product for plants produced as a result of photosynthesis and it is temperory stored as starch
100
Identify the chloroplast in the plant cell
What is number 7
100
What is function of xylem?
What is xylem?Vascular tissue that transports water and mineral salts throughout the plant from the roots
100
Xylem tubes transport substances in which direction?
On way from roots to leaves
200
What is chlorophyll?
The green pigment that absorbs and stores the energy of sunlight.
200
Photosynthesis uses light energy, carbon dioxide, and ______ to produce __________ and ________.
Water, oxygen and glucose
200
What are the reactants of Photosynthesis
Carbon dioxide and water
200
What is function of phloem?
Vascular tissue responsible for transporting sucrose throughout the plant from the leaves.
200
Phloem tubes transport substances in which direction?
Bi directional
300
Identify TWO reactants of photosynthesis
Carbon dioxide and water
300
What is the function of the guard cells?
To photosynthesize and change its turgidity to control the size of the stoma
300
What are the conditions required for photosynthesis and what are the products formed?
Products: Glucose and oxygen
Condition: Sunlight and chlorophyll
300
What is another function of the xylem other than transport?
To provide mechanical support to the plant as the walls of the xylem is ligninfied.
300
The vascular tissue shown below is:
Phloem
400
Name the internal parts of the leaf that can photosynthesize
Palisade Mesophyll, Spongy Mesophyll, guard cells
400
State the equation for photosynthesis
Carbon dioxide + water --> C6H12O6 + oxygen + water
400
What is destarching of the plant?
To place the plant in the dark for 24 hours to remove stored starch to ensure that no photosynthesis takes place at the start of the experiment.
400
Describe how are xylem adapted for their function.
Xylem are dead cells that have thick walls made of lignin.
The vessel is long hollow and unobstructed to ensure smooth flow of water.
400
The image shows vascular bundles in what part of the plant. WHich part does this belong to?
Root
500
Explain the difference between the 2 mesophyll layers.
Photosynthesis is carried out in these cells, especially at the Palisade which are located underneath the epidermis that is transparent.
Mesophyll layer has air spaces which allows constant gaseous exchange.
500
Describe how to test if photosynthesis has occured
Using the starch test for photosynthesis (briefly elaborate steps)
500
Describe how to test if photosynthesis has taken place.
Using the starch test by soaking the treated leaf with iodine. The leaf is boiled and decolourised by alcohol to remove chlorophyll.
500
A stick of celery is left in a beaker containing a solution of blue food colouring. After two days, the celery is taken out and it is seen that parts of the celery have turned blue. Explain why
The blue water dye is absorbed by the stem and transported at the xylem vessels and thus the parts that turned blue is xylem.
500
The diagram below shows vascular bundles in what part of the plant. Which part does it belong to?
Stem