Advertisements
Advertisements
Question
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow:
- Name the factor studied in this experiment.
- What will you observe in the experimental leaf after the starch test?
- Explain the process of photosynthesis.
- Give a balanced chemical equation to represent the process of photosynthesis.
- Draw a neat, labelled diagram of an experimental setup to show that oxygen is released during photosynthesis.
Advertisements
Solution
- The factor studied in this experiment is Sunlight.
- It will be observed that only the parts of the leaf that could get sunlight turn blue-black, and the parts covered with black paper do not turn blue, as they could not synthesise starch.
- Photosynthesis is the process by which living plant cells, containing chlorophyll, produce food substances (glucose and starch) from carbon dioxide and water, using light energy. Plants release oxygen as a by-product during photosynthesis.
- \[\ce{6CO2 + 12H2O ->[Light energy][Chlorophyll] C6H12O6 + 6H2O + 6O2\uparrow}\]
APPEARS IN
RELATED QUESTIONS
Give biological explanations for Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered.
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow :
(ii) Name the tropic movement shown by part 1.
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
State the main functions of the following:
Medulla Oblongata
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 |
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 perform photosynthesis.
Give technical term:
Organisms which cannot prepare their own food by photosynthesis.
State whether true or false. If false, correct the statement.
Plants lose water when the stomata on leaves are closed.
Study the pictures below and then complete the table by putting a plus (+) if the shoot or root grows towards the stimulus and a minus (-) if it grows away from it.
| Stimulus | Light | Gravity |
| Shoot | + | - |
| Root | ? | + |
