Photosynthesis Test Tube and Funnel Experiment: A Bio-Botany Practical Guide

Photosynthesis-Test tube and Funnel Experiment (Demonstration)

PHOTOSYNTHESIS-TEST TUBE AND FUNNEL EXPERIMENT (DEMONSTRATION)

Aim:

To prove that oxygen is evolved during photosynthesis.

Materials required:

Test tube, funnel, beaker, pond water and Hydrilla plant.

Procedure:

1. Take a few twigs of Hydrilla plant in a beaker containing pond water.
2. Place an inverted funnel over the plant.
3. Invert a test tube filled with water over the stem of the funnel.
4. Keep the apparatus in the sunlight for few hours.

Experimental setup to demonstrate oxygen evolution during photosynthesis.

Observation:

After one hour, it is noted that water gets displaced down from the test tube.

Inference

During photosynthesis, oxygen is evolved as a by-product. Gas bubbles liberated from the Hydrilla plant reach the top of the test tube and it displaces the water downwards. Take the test tube and keep the burning stick near the mouth of the test tube. Increased flame will appear. Hence, it is proved that oxygen is evolved during photosynthesis.

To Study Mendel's Law of Dominance: 10th Science Bio-Botany Practical

To Study the Law of Dominance - Bio-Botany Laboratory Practical Experiment

TO STUDY THE LAW OF DOMINANCE

Aim:

To study the law of dominance by using model / picture / photograph. To find out the genotypic ratio and phenotypic ratio in pea plant using checker board

Procedure:

Depict parental generation and the gametes using colour chalk pieces

Result:

• Phenotypic ratio 3:1
• Genotypic ratio 1:2:1

Explanation:

Inheritance of only one pair of contrasting character is called monohybrid cross. A cross between two forms of a single trait like a cross between tall and dwarf pea plant.