answer only Q.4 from these ........!!!!!! Q.1 name the process being studied. Q.2 explain the process named above in fig. Q.3 why was the pot covered with a plastic sheet . Q.4 suggest a suitable control for the experiment (only through diagram). Q.5 list the 2 adaptations in plant to reduce the above process.
Answers
Answer:
1) Process of Transpiration in potted plant under a bell jar..
2)Transpiration is the conversion of water from liquid to gas as it passes through plant stomata, small openings on the undersides of leaves of vascular plants. So to explain the phenomena of Transpiration consider the following experiment..
Place a small potted plant under Bell jar. Cover pot with polythene bag and consider another Bell jar without potted plant and then keep it in sunlight for some hours and then observe that..
Water drops appear inside the walls of the bell jar containing potted plant whereas no water drops appear in empty bell jar. This demonstrates that water is evaporated from the surface of leaves in presence of sunlight.
3)The pot covered with a plastic sheet so that the water vapour condenses on it and does not escape in the atmosphere.
4)The control for this experiment can be set up as same without a living plant.
5)The stomata are sunken into pit. Stomata are covered by hair. The leaf is narrow to reduce the number of stomata.