Advertisements
Advertisements
Question
Long answer question.
In order to carry out photosynthesis, what are the substances that a plant must take in? Also mention their sources.
Advertisements
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:
\[\ce{carbon dioxide + water ->[chlorophyll][sunlight]glucose +oxygen}\]
APPEARS IN
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.
Why do leaves generally look green?
Short answer question.
Which gas is taken in and which one is given out by the leaf in bright sunlight?
(i) Taken in :
(ii) Given out:
Suppose we compare the leaf with a factory, match the items in Column A with those in Column B.
| Column A | Column B | ||
| Left | Factory | ||
| 1 | Cells in the leaf | a | Raw materials |
| 2 | Chloroplast | b | Power |
| 3 | Sunlight | c | Machinery |
| 4 | Oxygen and water | d | End product |
| 5 | Carbon dioxide and water | e | By product |
| 6 | Glucose | f | Workroom |
Long answer question.
What is the role of chlorophyll in photosynthesis?
Long answer question.
Do plants need oxygen? If so, what is its source?
Tick the most appropriate answer.
Exhaled air contains
Are the following statement true or false? Give a reason in support of your answer.
The outside atmospheric temperature has no effect on the rate of photosynthesis.
Two groups (A & B) of bean plants of similar size and same leaf area were placed in identical conditions. Group A was exposed to the light of wavelength 400-450 nm & Group B to light of wavelength of 500-550 nm. Compare the photosynthetic rate of the 2 groups giving reasons.
According to Blackman, respiration of carbohydrates and fats is ______.
