Advertisements
Advertisements
प्रश्न
State the main functions of the following:
Cytokinins
Advertisements
उत्तर
Cytokinin are class of plant growth substances that promote cell division or cytokinesis in plant root and shoots.
APPEARS IN
संबंधित प्रश्न
Given below is an experimental setup to demonstrate a particular tropic movement in germinating seeds. Study the diagram and answer the questions that follow:
- Label the parts 1 and 2.
- Name the tropic movement shown by part 1.
- Part 1 is affected by two stimuli. Name them. Which one of the two is stronger?
- What is thigmotropism? Give one example.
- What is meant by 'Positive' and 'Negative' tropic movements in plants?
Name the following:
The products that are formed as a result of photosynthesis.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
The dark reaction of Photosynthesis is light-independent.
Answer the following question.
Explain why photosynthesis is considered the most important process in the biosphere.
State whether true or false. If false, correct the statement.
Plants lose water when the stomata on leaves are closed.
Where do the light-dependent reaction and the Calvin cycle occur in the chloroplast?
Read the following sentences about photosynthesis:
- Sunlight, carbon dioxide, chlorophyll and water are necessary.
- Oxygen is absorbed.
- Leaves carry out photosynthesis.
- Proteins are made during photosynthesis.
Choose the correct pair of sentences that are true to photosynthesis.
Plants utilize only ______% of the absorbed water for photosynthesis and the other activities.
A potted plant with variegated leafes was kept in dark for 24 hours and then placed in bright sunlight. Answer the following questions.
- Which aspect of photosynthesis is being tested in the above diagram?
- Why was the plant kept in the dark for 24 hours?
- After the starch test, what will be the colour of the yellow and green parts of the leaf? Give reasons to support your answer.
