Q. Plants which live under water obtain oxygen from dissolved oxygen in water by

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Q. An estimated survey reports that 90% lung cancer is caused by

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Q. When there is low tension of oxygen, oxyhaemoglobin rapidly

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Q. Subdivision of bronchus are called

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Q. Unlimited growth which expands by invasion and metastasis is

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Q. Special pores help in gaseous exchange in cork tissue are

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Q. Lungs of frog are fully expanded like

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Q. Double layered thin membranous sacs which covers lung are called

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Q. Sheet of skeletal muscles which are present in chest is

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Q. Corpuscles which are combined with potassium are carriers of

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Q. In condition of low oxygen concentration, oxyhaemoglobin is

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Q. There is no involvement of blood in transport of gases in

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Q. Ten pair of apertures in tracheal trunk of cockroach is called

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Q. Photorespiration depend upon

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Q. Water is 50 times more viscous than

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Q. Growth of mycobacterium is accelerated in

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Q. After gaseous exchange, air is removed by process of

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Q. Tissue which is made up of dead cells in older stems is called

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Q. Tobacco weakens walls of

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Q. Efficient respiration is done in Hydra by help of

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