Question

All plants give out oxygen during the day and carbon dioxide during night do you agree with the statement give reasons. And also tell if leaves of a healthy potted plant were coated with Vaseline all the plant remain healthy for a long time give reasons

Answer 1

-This statement is not fully correct.
"All plants give out oxygen during day and carbon dioxide during night"

Explanation :

Photosynthesis occurs only during day time.
During this time oxygen is produced . Some oxygen is used for respiration and rest of oxygen is diffused out into air.
Carbon dioxide produced during day time by respiration is used in photosynthesis.

But at night time, no photosynthesis occurs and hence no oxygen is produced oxygen from air diffuses into leaves to carry out respiration and carbon dioxide produced by respiration diffuses out into air.

Hence Respiration occurs day and night .. Hence Carbon dioxide is emitted all the time.


-Stomata are the pores through which oxygen and carbon dioxide are exchanged during photosynthesis. Water evaporates from the stomata by transpiration. This action pulls more water up through the xylem. The vaseline plugged into the openings and the leaf will not able to receive the necessary carbon dioxide gas or eliminate excess oxygen gas, and so wouldn't be able to survive for a long time, and would eventually die.