Q. Older sediment layers have less radioactive isotopes than

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Q. An organic molecule is a type of molecule in which a molecule is composed of

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Q. A statement which is given after observations and organizing data is called a

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Q. Number of chemical compounds from which living organisms are made is

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Q. Plants and animals which are in danger of extinct if not protected are studied under name

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Q. Today size of a living world is

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Q. Water which enters xylem cells, increase cell's

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Q. In western civilization, throembolism may lead to

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Q. Response of passive immunity is

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Q. Heart of an amphibian has three chambers i.e.

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Q. Hemorrhage occurs when walls of arteries become hard and lose their

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Q. Formation of thrombus in heart can lead to

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Q. Original volume of cell wall is restored after removal of

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Q. Water molecules move rapidly hence possess

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Q. Prothrombin protein acts as a catalyst and help in blood

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Q. Immunity which is achieved by introduction of antigen artificially in body is called

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Q. A degenerative arterial change which is associated with advancing age is called

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Q. Normal flow of blood is facilitated by muscular activity of

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Q. Renal retention of salts and water lead to disease

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Q. Lub' sound is produced when tricuspid and bicuspid valves are

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