during the night the stomata closes so the carbon dioxide can not be released out through stomata then through which part of the plant is carbon dioxide released during the night?

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Solution

During night, the stomata are closed and plants release carbon dioxide as a result of their cellular respiration. Lenticels are the tiny openings in the stem of the plant which allows the exchange of gases even during night. So. it is through these lenticels that CO₂ is released at night. Also, plants release oxygen during daytime not carbon dioxide.

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Q. During photosynthesis, plants absorb carbon dioxide from the air through stomata.

Q. All plants give out oxygen during day and carbon dioxide during night.

During daytime plants take in oxygen and give out carbon dioxide, during the night it is vice-versa.

Match the reasons given in column 2 to the features of cacti on column 1.

$\begin{matrix} F e a t u r e o f c a c t i & R e a s o n s a . Spiny leaves & (i) Absorbing water from depths of soil b . Thick, round fleshy stems & (i i) Prevent loss of water by transpiration c . Deep roots & (i i i) Store water d . Closed stomata during the day & (i v) Prevent animals from eating the cactus e . Carbon dioxide storage during the night \end{matrix}$

Choose the correct option that matches correctly. There can be multiple matches.

Q. Case: Transpiration is the evaporative loss of water by plants. It occurs mainly through the stomata in the leaves. Besides the loss of water vapour in transpiration, exchange of oxygen and carbon dioxide in the leaf also occurs through pores called stomata. Normally stomata remain open during the day and close at night.

Based on the above case answer the following question:

Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following options.

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