Investigate the conditions required for seeds to germinate. Set up your
apparatus as shown in figure. Keep the dishes at room temperature for a week.
Explain your observations.
Soaked peas/seed, Soaked peas/seed, Soaked peas/seed,
Dry cotton wool
Wet cotton wool Covered with water
Answers
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.
EXPERIMENT TO PROVE THAT SUITABLE TEMPERATURE IS NECESSARY FOR GERMINATION - DEFINITION
Aim: To prove that suitable temperature is necessary for germination.
Apparatus: Two beakers marked A and B, seeds of pea, water and cotton wool.
Procedure: Take two beakers marked A and B respectively. Place some pea seeds on cotton wool in both the beakers.Keep beaker A at room temperature and B in refrigerator.
Observation: The seeds in beaker A germinate and in B do not germinate.
Result: Suitable temperature is necessary for germination.
EXPERIMENT TO PROVE THAT WATER IS NECESSARY FOR GERMINATION - DEFINITION
Aim: To prove that water is necessary for germination.
Apparatus: Two beakers marked A and B, seeds of Pea,water and cotton wool.
Procedure: Take two beakers which are marked A and B respectively.In beaker place some pea seeds on a wet cotton wool and in beaker B pace some pea seed on a dry cotton wool. Keep the beakers at room temperature.
Observation: The seeds in beaker A germinate and in B do not germinate.
Result: Water is necessary for germination.
THREE BEAN SEED EXPERIMENT - DEFINITION
Aim: To prove that seed needs oxygen, water and temperature in equal proportions.
Apparatus: A glass slide, a beaker, a thread and bean seeds.
Procedure: Take a glass slide and tie three mature bean seeds at different position. Place the slide in the beaker containing water in such a way that the seed at top is above the water, the middle seed is at the water level and the third seed is submerged in water.
Observation: The top seed does not germinate as it gets oxygen but no water. The middle seed germinates as it gets both oxygen and water. The bottom seeds do not germinate but shows emergence of tiny radical as it gets dissolved oxygen in water in small amount.
Result: A seed need oxygen, water and temperature in equal proportions. In this experiment, the requirement of oxygen is not completely demonstrated.
Explanation:
Materials
Bean seeds, water, cotton wool, rubber stopper, 4test tubes, cooking oil, boiling water, ice water
preparation procedure
1.. prepare for test tube from label them 1, 2,3
and 4
2 buy ice for ice water
3
boil water and let it cool to room temperature
activity procedure
1 place cotton wool and the bottom of each test tube
2 add a few seeds in each of the test tubes
3 in test tube 1 add in a water to soak the Cotton wool
4 in test tube to add cool boiled water to ODIs seats at small amount of oil to from layer above the water
5 in test tube 3 add ice water
6 in test tube 4 do not add any water
7 keep it test tube under these condition for 4 days
8 record your observation everyday and at water as native to eat tub being sure to add only ice water test tube3
results and conclusion
only test tube one will show paper termination The Other test tube will show little or no growth because they do not have the condition necessary for germination
Hope it's help you