Question

10. An experiment was set-up as shown below: WATER DRIED PEA SEEDS e . of BEAKER (B) BEAKER (A) () What is the aim of the experiment? (it) What is the purpose of Beaker B. (iii) Draw the diagram of Beaker 'A' as it woul appear after a few days. (iv) Would the result be same if instead of drie peas, peas that have been killed by heating an oven are used ?​

Answer 1

Answer:

EXPERIMENT TO PROVE OXYGEN IS NECESSARY FOR GERMINATION - DEFINITION

Aim: To prove that oxygen is necessary for germination.

Apparatus: Two conical flask marked A and B, seeds of pea, water, cotton wool, pyrogallic acid, test tubes.

Procedure: Take two conical flask with a cork and mark them A and B respectively.Place a wet cotton wool in each flask with some soaked Pea seeds. Pyrogallic acid absorbs oxygen so a test tube of in flask B in such a way that the cemical dosent drop in the flask. In flask A hang a test tube of plain water.

Observation: The seeds in flask A germinate because of presence of oxygen and seeds in flask B do not germinate because pyrogallic acid absorbs oxygen.

Result: Oxygen is necessary for germination.

Answer 2

Answer:

(1) To prove that water is necessary for germination.

(2) The purpose of beaker B is to show that without water seed can't germinate.

(3) Below Diagram.

(4) The seeds in beaker A germinate and in B do not germinate.If instead of dry peas, peas that have been killed by heating in oven are used than both the seed will not germinate.