Advertisements
Advertisements
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 meant by ‘Positive’ and ‘Negative’ tropic movements in plants?
Advertisements
उत्तर
Positive tropism is movement or growth towards a stiumulus where ax negativfe tropism is movement or growth away from a stimulus.
APPEARS IN
संबंधित प्रश्न
Give biological reasons for the following statements : In some xerophytes leaves are modified into spines
The diagram below shows two test-tubes A and B. Test-tube A contains a green water plant. Test-tube B contains both a green water plant and a snail. Both testtubes are kept in sunlight. Answer the questions that follow:
(i) Name the physiological process that releases the bubbles of oxygen.
(ii) Explain the physiological process as mentioned above in Q2 (a)(i).
(iii) What is the purpose of keeping a snail in test-tube ‘B’?
(iv) Why does test-tube ‘B’ have more bubbles of oxygen?
(v) Given an example of a water plant that can be used in the above process.
(vi) Write the overall chemical equation for the above process.
Define the following:
Quantum
Define the following:
Organic food
Fill in the blank:
Xanthophyll is ______ coloured pigment.
Identify the false statements and rewrite them correctly by changing the first or last word only.
Immediate product of photosynthesis is glucose.
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 are the basic requirements of photosynthesis?
What is the importance of photosynthesis in the life of the following:
Non-green plants
Complete the following sentence with appropriate word:
One of the products of ______of water is oxygen.
