Prove that Oxygen is Released during Photosynthesis

Oxygen is Released during Photosynthesis




  1. i) Place a funnel over the shoot of hydra (water plant) in a beaker of water.


  1. ii) Invert a test tube filled with water over funnel.


iii) Place funnel such that water can freely circulate.


  1. iv) Now keep the apparatus in sunlight for some time.


  1. v) Bubbles of gas will soon appear from cut end of stem.


  1. vi) Bubbles rise and gather in test tube. Remove test tube when filled.


vii) The match stick will burn with flame show that tube is rich with oxygen.


viii) So it is proved that oxygen is released during photosynthesis.


Note: Of course, the correspondence form of training has a number of advantages, and first of all it refers to the time of the visit to the educational institution – the student-correspondence student spends only a few weeks in the university during the first half of the year. At the same time, the attendance of those who receive education is far from as important as in the case of students who are permanently employed. The trainee, who receives a specialty, often works in parallel, starting from work only for the period of passing the examination session. The only exception is those students who approach the educational process in an extremely responsible way, devoting a lot of time to independent study of university disciplines. In correspondence education there is one more important plus – a student who, in parallel with obtaining an education, worked according to the profile of the chosen specialty, has an advantage in employment in comparison with those graduates of higher educational institutions who have studied in the day time department and are just starting to look for the first job.

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