a) Light
•Requirements
Methylated spirit, iodine solution, water, white tile, droppers, beaker, source of heat, boiling tube, light proof material e.g. aluminium foil, potted plant and clips.
•Procedure
Cover two or more leaves of a potted plant with a light proof material.
Place the plant in a dark place for 48 hours (keeping the plant in the dark for 48 hours is to ensure that all the starch in it is used up. This makes the leaves ideal for investigating whether starch would form in the experimental period. This is called destarching).
Transfer the potted plant to light for 5 hours.
Detach and uncover the leaves and immediately test for starch in one of the covered leaves and one that was not covered.
b) Carbon (IV) oxide
•Requirements
Sodium hydroxide pellets, ?ask, jelly
•Procedure
Destarch the plant for 48 hours
Place a few pellets of sodium hydroxide in the ?ask
Bore a hole in the cork of the same size as the petiole of the leaf being used
Cut the cork lengthwise. Chlorophyll
For this experiment, a variegated leaf is required. This is a leaf in which some patches lack chlorophyll.
These patches could be yellow. They lack chlorophyll hence photosynthesis does not take place in them.
•Procedure
Detarch or remove variegated leaf that has been exposed to light for at least three hours.
Draw a large diagram of the leaf to show the distribution of the chlorophyll
Test the leaf for starch and record observations.
Anganifelix answered the question on May 9, 2018 at 09:54
- Explain the Factors that affect the rate of photosynthesis(Solved)
Explain the Factors that affect the rate of photosynthesis.
Date posted: May 9, 2018. Answers (1)
- Describe an experiment to Test for starch in a leaf.(Solved)
Describe an experiment to Test for starch in a leaf.
Date posted: May 9, 2018. Answers (1)
- Photosynthesis is a complex process that involves a series of reactions. Explain the two main reactions that are involved in photosynthesis. (Solved)
Photosynthesis is a complex process that involves a series of reactions. Explain the two main reactions that are involved in photosynthesis.
Date posted: May 9, 2018. Answers (1)
- Describe the structure of the chloroplast (Solved)
Describe the structure of the chloroplast
Date posted: May 8, 2018. Answers (1)
- Describe the structure, functions and adaptation of the following parts of a leaf : (a) cuticle (b) epidermis (c) guard cells d) palisade mesophyll(Solved)
Describe the structure, functions and adaptation of the following parts of a leaf :
i) cuticle
ii) epidermis
iii) guard cells
iv) palisade mesophyll
v) Spongy mesophyll layer
vi) Vascular bundle/tissue
Date posted: May 8, 2018. Answers (1)
- Describe the External leaf structure(Solved)
Describe the External leaf structure
Date posted: May 8, 2018. Answers (1)
- What are the importance of photosynthesis? (Solved)
What are the importance of photosynthesis?
Date posted: May 8, 2018. Answers (1)
- Explain the meaning and types of autotrophism (Solved)
Explain the meaning and types of autotrophism
Date posted: May 8, 2018. Answers (1)
- Explain the two modes of nutrition (Solved)
Explain the two modes of nutrition
Date posted: May 8, 2018. Answers (1)
- (i) Define the term nutrition. (ii) Explain how nutrients are useful to living organisms. (Solved)
i) Define the term nutrition.
ii) Explain how nutrients are useful to living organisms.
Date posted: May 8, 2018. Answers (1)
- Discuss the Role of Osmosis in Organisms(Solved)
Discuss the Role of Osmosis in Organisms
Date posted: May 8, 2018. Answers (1)
- Explain the wilting process. (Solved)
Explain the wilting process.
Date posted: May 8, 2018. Answers (1)
- Discuss what would happen if a plant cell is placed in solutions of varying concentrations.(Solved)
Discuss what would happen if a plant cell is placed in solutions of varying concentrations.
Date posted: May 8, 2018. Answers (1)
- Discuss what would happen if an animal cell, say red blood cell is placed in solutions of varying concentrations.(Solved)
Discuss what would happen if an animal cell, say red blood cell is placed in solutions of varying concentrations.
Date posted: May 8, 2018. Answers (1)
- Describe an experiment for the demonstration of Osmosis Using a Visking Tubing.(Solved)
Describe an experiment for the demonstration of Osmosis Using a Visking Tubing.
Date posted: May 8, 2018. Answers (1)
- Describe an experiment for the demonstration of the process of diffusion using potassium manganate (VII).(Solved)
Describe an experiment for the demonstration of the process of diffusion using potassium manganate (VII).
Date posted: May 8, 2018. Answers (1)
- Define the term osmotic potential(Solved)
Define the term osmotic potential.
Date posted: May 8, 2018. Answers (1)
- Explain osmotic pressure(Solved)
Explain osmotic pressure
Date posted: May 8, 2018. Answers (1)
- Explain the process of Osmosis (Solved)
Explain the process of Osmosis
Date posted: May 8, 2018. Answers (1)
- Explain how materials move in and out of the cells through Diffusion.(Solved)
Explain how materials move in and out of the cells through Diffusion.
Date posted: May 8, 2018. Answers (1)