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प्रश्न
Choose the correct answer:
Stomata open during day time because guard cells
विकल्प
Do photosynthesis and synthesis osmotically active.
Are of thin walls.
Are of bean shape.
Help in exchange of gases.
उत्तर
Stomata open during day time because guard cells do photosynthesis and synthesis osmotically active
APPEARS IN
संबंधित प्रश्न
Choose the correct answer:
Stomata can open in night also in _______________
Given ahead is the diagram of an experimental set up to study the process of transpiration in plants. Study the same and then answer the question that follow:
Why are glass slides placed over the dry cobalt chloride papers?
The diagram below represents a structure found in a leaf.
Study the same and answer the questions that follow:
(i) Name the pis labeled A and B.
(ii) What is the biological term for the above structure?
(iii) What is the function of the part labeled A?
(iv) Mention two structural features of A, which help in the function mentioned in (iii) above.
(v) Where is this structure likely to be found in a leaf?
(vi) The above structure helps in the process of transpiration. Explain the term transpiration.
(vii) How many other cells are found surrounding this structure as seen in the diagram?
Given below is the diagram of an experimental set up to study the process of transpiration in plants. Study the same and then answer the questions that follow:
(i) What is the colour of dry cobalt chloride paper?
(ii) Is the experimental leaf a monocot or a dicot? Give a reason to support your answer.
(iii) Why axe glass slides placed over the dry cobalt chloride papers?
(iv) After about half an hour what change, if any, would you expect to find in the cobalt chloride paper placed on the dorsal and ventral sides of the leaf? Give a reason to support your answer.
(v) Define the term ‘transpiration’.
Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal Cells, cell wall and Nucleus.
Complete the following sentence with appropriate word:
In Nerium, the stomata are present in _________.
Guard cells help in regulating the ______.
The upper layer of mesophyll in a leaf consists of elongated ground tissue called ______.
Give a reason/suitable explanation.
More transpiration occurs from the under surface of a dicot leaf.
