Unicellular Organism
Object
To identify the unicellular organism in the given permanent slide. Draw a labeled diagram and give three characteristics.

• Specification No.1
  
  IDENTIFICATION
  The given specification is AMOEBA Proteus.
  
  CHRACTERISTICS
• · IT is a unicellular organism with no definite shape.
  · IT has finger like projections called pseudopodia which help in locomotion.
  · Its cytoplasm consists of outer Ectoplasm and inner Endoplasm.
• Endoplasm contains nucleus’ contractile vacuoles and food vacuoles

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Materials Required

Water Plant (Hydrilla) Soda bicarbonate

PROJECT TITLE:Oxygen and Photosynthesis

1. 
   
   
   
   
   Aim: To show that oxygen is given off during photosynthesis
   
   Materials Required:
   1. Water plant
   2. Beaker
   3. Funnel
   4. Soda Bicarbonate
   5. T est Tube
   
   Procedure:
   
   Put some green submerged water plants such as Hydrilla in a large beaker filled with water. Add a little soda bicarbonate as a source of carbon dioxide or a small quantity of soda water. Cover the plants under water with a glass funnel, and invert over the funnel under water a test-tube filled with water. Cut the stems and tie up the shoots into a bundle and the cut ends should be projected upwards into the funnel.
   
   Observations

When exposed to light, a stream of small gas bubbles is seen to rise upwards through the cut ends of stems and collect at the upper end of the test-tube, displacing the water. If the apparatus be removed to a dark or semi-dark room, or is covered with black paper, no bubbles will be seen to come out of the plants.

Result

:The gas is oxygen and can be proved in the following way. Close the test-tube with the thumb under water, and invert it over a dish containing a quantity of pyrogallate of potash (5 % pyrogallic acid to which an excess of caustic potash has been added). Then use a bent tube to introduce into the test-tube a quantity of this solution. The pyrogallate solution coming in contact with the gas will absorb it, and will, therefore, rise and completely fill up the test-tube. The pyrogallate solution absorbs oxygen. The gas in the tube is, therefore, oxygen.

To see Animated Photosynthesis

http://www.goalfinder.com/preview/SPLPHE9.swf?productid=39http://www.pbs.org/wgbh/nova/methuselah/photosynthesis.html

PROJECT TITLE
Oxygen and Photosynthesis

AIM
To show that oxygen is given off during photosynthesis.


Materials Required


Water Plant (Hydrilla)


Soda bicarbonate

Glass funnel

Test-tube

Beaker with Water


Procedure
Put some green submerged water plants such as Hydrilla in a large beaker filled with water.
Add a little soda bicarbonate as a source of carbon dioxide or a small quantity of soda water.
Cover the plants under water with a glass funnel, and invert over the funnel under water
a test-tube filled with water. Cut the stems and tie up the shoots into a bundle and the cut
ends should be projected upwards into the funnel.

Observation
When exposed to light, a stream of small gas bubbles is seen to rise upwards through the
cut ends of stems and collect at the upper end of the test-tube, displacing the water.
If the apparatus be removed to a dark or semi-dark room, or is covered with black paper,
no bubbles will be seen to come out of the plants.

Inference
The gas is oxygen and can be proved in the following way. Close the test-tube with the thumb
under water, and invert it over a dish containing a quantity of pyrogallate of potash
(5 % pyrogallic acid to which an excess of caustic potash has been added). Then use a
bent tube to introduce into the test-tube a quantity of this solution. The pyrogallate
solution coming in contact with the gas will absorb it, and will, therefore, rise and
completely fill up the test-tube. The pyrogallate solution absorbs oxygen. The gas in
the tube is, therefore, oxygen.