Why is the use of iodised salt advisable?

Iodised salt contains iodine which stimulates the thyroid gland to produce thyroxine hormone. This hormone regulates the metabolism of fats, carbohydrates and protein in the body. Deficiency of iodine in our diet can lead to a condition called goitre, which is characterised by enlargement of the thyroid gland and swelling of the neck.

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 47

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The growth of tendrils in pea plants is due to the:

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Important Questions on Control and Coordination

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 48

Which of the following phytohormone is not associated with the promotion of growth in plants?

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 49

The plant hormone which triggers the fall of mature leaves and fruits from the plant body is

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 50

Which of the following terms denotes the movement of the root of a plant towards moisture in the soil?

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 51

The growth of a pollen tube towards the ovule caused by a sugary substance as the stimulus is an example of

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 52

The bending of the shoot of a plant in response to light is called:

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 53

The stimulus in the process of thigmotropism is :

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 54

A growing seedling is kept in a dark room. A burning candle is placed near it for a few days. The top part of seedling bends towards the burning candle. This is an example of :

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Science for Tenth Class Part - 3 Biology>Chapter 2 - Control and Coordination>Multiple Choice Questions (MCQs)>Q 55

Which of the following acts as a stimulus in the process of hydrotropism?