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प्रश्न
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow : 
What is Thigmotropism? Give one example.
उत्तर
Thigmotropism is a directional movement which occur as a mechanosensory response to a touch stimulus. It is typically found e.g. Touch me not plant.
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संबंधित प्रश्न
Cytoplasm : Cytokinesis : : Nucleus : __________
Identify the odd one in each set : Transpiration, Photosynthesis, Phagocytosis, Guttation
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?
How does carbon dioxide return to the atmosphere? Explain.
A student in order to study the importance of certain factors of photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning the student covered one of the leaves with black paper in the centre only. Student placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch.
(i) What aspect of photosynthesis was being investigated?
(ii) Is there any control in this experiment? If so, state the name.
(iii) Why was the plant kept in the dark before the experiment?
(iv) Describe step by step how the candidate proceeded to test the leaf for the presence of starch.
Choose the correct answer:
Which one of the following is the best reason for leaving a plant in a dark place before carrying out experiments on photosynthesis?
The specific function of light energy in the process of photosynthesis is to
Identify the false statement and rewrite it correctly by changing the first or last word only.
Green plants are consumers.
Identify the false statement and rewrite it correctly by changing the first or last word only.
Green plants perform photosynthesis.
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Describe step by step, how the candidate proceeded to test the leaf for the presence of starch?
What is the importance of photosynthesis in the life of the following:
Non-green plants
Explain, why respiration is said to be a reversed process of photosynthesis?
Name the following:
Source of oxygen given out in photosynthesis.
Give technical term:
The main reaction which means the breaking up of water molecules through light.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Leaves are broad and flat to increase the surface area for photosynthesis.
During photosynthesis, ________ is produced and stored in the leaf.
Planting trees help in decreasing global warming.
______ is positively hydrotropic as well as positively geotropic.
The minerals like nitrogen, potassium, and phosphorus, which are required in substantial quantity by the plants are called ______.
What is the end product of photosynthesis?
Guard cells of stomata are green but cannot photosynthesize? Give reason.
