Q. Seeds of some desert plants can germinate after _________ years of dormancy

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Q. Dormancy enables the seeds to survive in

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Q. In sunlight the guard cells have increased concentration of ion named as

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Q. Cuticle protect plant from

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Q. Lamina of the leaf is a source to obtain sufficient

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Q. Guard cells are the ones which can make

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Q. Lower epidermis have many openings which are called

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Q. Chlorophyll contained by the chloroplasts have structure like

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Q. For synthesis of amino acids and proteins plant requires

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Q. A metallic element that plant contain is

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Q. In culture experiment the amount of potassium acid phosphate is

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Q. Excessive transpiration causes cells to lose their turgidity, become flaccid and plant

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Q. Cooling effect in plants is due to

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Q. The pressure act as helper to support the leaf and keep the leaf firm is

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Q. The rate of transpiration will be slower if the humidity of air is

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Q. In plants, the upward movement of water and mineral salts is mainly forced by

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Q. In small plants the mechanism for upward movement of water is

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Q. The cobalt chloride paper change its colour from blue to pink in the presence of

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Q. The transpiration which allow only small amount of water to evaporate is

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Q. Through root pressure, water passes from living cells into xylem vessels by

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