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प्रश्न
"Oxygen is a waste product of photosynthesis." Comment.
उत्तर
Oxygen is released during photosynthesis. Some of this oxygen may be used in respiration in the leaf cells, but the major portion of it is not required and it diffuses out into the atmosphere through the stomata. However, in a sense, even this oxygen is not a waste because all organisms require it for their existence including the plants.
संबंधित प्रश्न
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow :
What will you observe in the experimental leaf after the starch test?
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow : 
Draw a neat, labelled diagram of an experimental steup to show that oxygen is released during photosynthesis
Define the following:
Plant pigments
The following statement is about photosynthesis in a green plant. Write whether it is True or False.
A variegated leaf (one that has white as well as green patches) will only photosynthesize in the green areas.
Match the terms of column I with those in column II:
| Column I | Column II |
| (i) Stomata closed | (a) decomposers |
| (ii) Autotrophs | (b) light reaction |
| (iii) By-products of photosynthesis | (c) animals |
| (iv) Photolysis | (d) during night |
| (v) Bacteria and fungi | (e) green plants |
| ( f) oxygen |
If the rate of respiration becomes more than the rate of photosynthesis, plants will:
The specific function of light energy in the process of photosynthesis is to
A plant is kept in a dark cupboard for 48 hours before conducting any experiment on photosynthesis in order to
Name the following:
The category of organisms that prepare their own food from basic raw materials.
Identify the false statement and rewrite it correctly by changing the first or last word only.
Green plants are consumers.
Complete the following food chains by writing the names of appropriate organisms in the blanks:
Grass → ______ → Snake → ______
Photosynthesis in green plants is directly and indirectly dependent on so many plant structures.
Explain briefly the role of the following structures in this process is Phloem tissue in the leaf veins.
How is the rate of photosynthesis affected when a green plant gets the green light?
Name the following:
The immediate product of photosynthesis.
Complete the following sentence with appropriate word:
Xanthophyll is ______ coloured pigment.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
KOH absorbs CO2.
Choose the correct option.
A cell that lacks chloroplast does not ______.
Mesophyll contains chlorophyll.
Guard cells of stomata are green but cannot photosynthesize? Give reason.
Define the following term:
Photolysis of water
