Life Processes Worksheet-13
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Why do the walls of a trachea not collapse when there is less air in it?
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What happens to the carbon dioxide which collects in human tissues?
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Write the differences between autotroph and heterotroph.
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Explain the mechanism of gaseous exchange between tissues and blood.
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How does water availability control the rate of photosynthesis?
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Why does chlorophyll appear red in reflected light and green in transmitted light?
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Why does leaf appear green?
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Why does photosynthesis decrease under very high light intensity?
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Distinguish between light reaction and dark reaction.
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What is the difference between stroma and grana?
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Distinguish between chloroplast and chlorophyll.
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What is the significance of photosynthesis?
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Why is the inner wall of alimentary canal not digested although the digestive enzyme can digest all the materials that make cells?
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What are the functions of stomach?
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What are the functions of small intestine?
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Distinguish between saprozoic and holozoic nutrition.
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Name the different types of teeth and give their functions.
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What is the difference between ingestion and egestion?
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Where are salivary glands situated in man? What are their functions?
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Write any two functions of large intestine in man.
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Name any four substances that are absorbed actively from the small intestine.
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Name the three activities that take place in internal respiration.
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Why have lungs replaced skin for gaseous exchange?
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Give two overall chemical equations representing aerobic and anaerobic respiration.
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Name two animals having cutaneous respiration. What special features of the skin make cutaneous respiration effective?
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What is the function of Adam's apple?
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Why do mammals require more extensive respiratory surface?
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State the functions of : (i) Diaphragm and (ii) Alveoli.
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Explain with reasons why the alveoli are covered with blood capillaries?
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Why is it harmful to respire through mouth than through nasal openings?
