1)write the procedure you have followed for the experiment.
2)why it is necessary to begin this experiment with buds in which petals are closed?
3)why are the buds enclosed in polythene bags?
4)why the non-pollinated flowers are also covered with polythene bags
Answers
Answer:
1 PROCEDURE:
Take some germinating seeds in a Thermos flask.
Cover the flask with a cork.
Insert the thermometer in the flask through the cork.
Observe the rise in temperature after some time.
RESULTS:
As the seeds respire, heat will be produced due to release of carbon dioxide. Thus, the temperature in the thermometer will rise.
PRECAUTIONS:
Thermos flask should be properly sealed so that no air enter it.
Thermometer should be properly inserted else it will break.
Leave the apparatus undisturbed for proper time as seeds will respire.
solution
2 . It is necessary in mammals and birds to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature
3These bags have provision on one side that allows attachment of a plastic tube in which pollen can be collected after shaking the bag. Bags for female flowers sometimes have nozzles for introducing the pollen without any need for them to open.
4Explanation: Pollination bags are designed to fit well over the inflorescence or individual flowers of a plant type. The size, shape and strength of bag should ensure that there is no contact with flowers to avoid development of diseases and physical hindrances in seed development
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