1. Saliva contains the enzyme amylase which breaks complex molecules into sugar.

    Saliva contains the enzyme amylase which breaks complex molecules into sugar.

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  2. Conditions necessary for photosynthesis: Sunlight, carbon dioxide and chlorophyll. Byproduct of photosynthesis: Oxygen

    Conditions necessary for photosynthesis:
    Sunlight, carbon dioxide and chlorophyll.
    Byproduct of photosynthesis: Oxygen

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  3. In aerobic respiration there is complete oxidation of glucose and the end product is water and carbon dioxide. In anaerobic respiration there is incomplete oxidation of glucose and the end product is either lactic acid or alcohol. Yeast and bacteria use anaerobic mode of respiration.

    In aerobic respiration there is complete oxidation of glucose and the end product is water and carbon dioxide.
    In anaerobic respiration there is incomplete oxidation of glucose and the end product is either lactic acid or alcohol.
    Yeast and bacteria use anaerobic mode of respiration.

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  4. The wall of alveoli contains a fine network of blood capillaries. This ensures maximum exchange of gases.

    The wall of alveoli contains a fine network of blood capillaries. This ensures maximum exchange of gases.

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  5. Haemoglobin is the carrier of oxygen in blood. Deficiency of haemoglobin will lead to less supply of oxygen to different cells. This will, in turn lead inefficient utilization of food by the body. Finally person’s health will deteriorate.

    Haemoglobin is the carrier of oxygen in blood. Deficiency of haemoglobin will lead to less supply of oxygen to different cells. This will, in turn lead inefficient utilization of food by the body. Finally person’s health will deteriorate.

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