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Chapter 6 NCERT Class 10 Science SOLUTIONS

3. Give an example of a plant hormone that promotes growth.
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Question:

Give an example of a plant hormone that promotes growth.

Answer:

  • Auxins are responsible for the cell elongation in shoots and also regulate growth.
  • Gibberellin is responsible for stem elongation and germination.
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(All Q's of this Chapter solved)
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What is the difference between the movement in the mimosa plant and the mode of movement in our leg?

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Compare and contrast the neural and hormone mechanisms of action for control and co-ordination in animals.

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How are involuntary actions and reflex actions different from each other?

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What is the need for a system of control and co-ordination in an organism?

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How does chemical co-ordination take place in plants?

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Which signals will get disrupted in case of a spinal cord injury?

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How does phototropism occur in plants?

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Draw the structure of a neuron and explain its function.

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What is the function of receptors in our body? Think of situations where receptors do not work properly. What problems are likely to arise?

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The brain is responsible for : (a) Thinking. (b) Regulating the heartbeat. (c) Balancing the body. (d) All of the above.

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The gap between two neurons is called a : (a) Dendrite. (b) Synapse. (c) Axon. (d) Impulse.

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Which of the following is a plant hormone? (a) Insulin (b) Thyroxine (c) Estrogen (d) Cytokinin

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Why are some patients of diabetes treated by giving injections of insulin?

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How does our body respond when adrenaline is secreted into the blood?

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Why is the use of iodised salt advisable?

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How does chemical co-ordination take place in animals?

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Design an experiment to demonstrate hydrotropism.

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How do auxins promote the growth of a tendril around a support?

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How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

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What is Plant Hormone?

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What is the role of the brain in reflex action ?

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How do we detect the smell of an agarbatti (incense stick) ?

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Which part of the brain maintains posture and equilibrium of the body ?

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What happens at the synapse between two neurons ?

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What is the difference between reflex action and walking ?

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