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Question
Long answer question.
In order to carry out photosynthesis, what are the substances that a plant must take in? Also mention their sources.
Solution
For preparing food, the plants require the following :
- Water (from the soil)
- Carbon dioxide (from the air)
- Chlorophyll (contained in the leaf)
- Energy (from sunlight)
The process of preparing or synthesizing food using water from the soil and carbon dioxide from the air, together chlorophyll and sunlight is called photosynthesis. This entire process is a series of complex chemical reactions Photosynthesis is represented as follows:
\[\ce{carbon dioxide + water ->[chlorophyll][sunlight]glucose +oxygen}\]
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RELATED QUESTIONS
Look at leaves of the same plant on the shady side and compare it with the leaves on the sunny side. Or, compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why?
Short answer question.
Which four of the following are needed for photosynthesis in a leaf:
(i) Carbon dioxide:
(ii) Oxygen:
(iii) Nitrates :
(iv) Water:
(v) Chlorophyll:
(vi) Soil:
(vii) Light:
State whether the following statement is True or False:
The free oxygen in the atmospheric air is the result of photosynthesis.
Tick the most appropriate answer.
Exhaled air contains
Tick the most appropriate answer.
Plants have these for the exchange of gases.
When there is plenty of light and a higher concentration of O2, what kind of pathway does the plant undergo? Analyse the reasons.
Draw and label the structure of oxysomes.
Process of photosynthesis is ______.
Photorespiration is favoured by :
In tropical rain forests, the canopy is thick and plants growing below receive filtered light. How are they able to carry out photosynthesis?
