The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow: The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow:
Which factor is being studied here?
Topic: Factor tested in the KOH experiment
Answer
CARBON DIOXIDE — the experiment proves that carbon dioxide is necessary for photosynthesis.
The apparatus identifies the factor. POTASSIUM HYDROXIDE absorbs carbon dioxide, so the leaf enclosed in the flask is deprived of it while everything else — light, water, chlorophyll — remains the same.
THE METHOD for every photosynthesis experiment: find the ONE thing that has been removed, and that is what is being tested. KOH in a flask — removes CARBON DIOXIDE a VARIEGATED leaf — removes CHLOROPHYLL from part of it black paper over part of a leaf — removes LIGHT Hydrilla under water — collects the OXYGEN released