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Subjects

Science

Life Processes

In this Class 10 Science topic from the chapter “World of Living,” students explore the essential processes that keep organisms alive and functioning. They learn how plants and animals obtain and use nutrition, release energy through respiration, transport substances such as water, minerals, gases and food, and remove metabolic wastes through excretion. The topic connects these ideas with photosynthesis and the roles of major human body systems, helping students understand how living organisms maintain life through coordinated biological activities.

Expert · Level 5 · 25 questions

Practice questions

01If a leaf receives light but carbon dioxide is removed from its surroundings, what will be the result of the starch test?

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02Why is starch found only in the green part of a variegated leaf?

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03What happens to stomata if water moves out of guard cells?

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04Plants close stomata in strong sunlight when water is scarce. What disadvantage can this also cause?

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05Splitting of water in photosynthesis is directly linked with which result?

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06If starch has formed in a leaf, what does it prove?

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07In Amoeba, ingestion of food depends on what?

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08If saliva lacks amylase, which digestive process in the mouth will be affected first?

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09Why is the oesophagus important in digestion even though it has very little digestive juice?

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10What is the dual importance of hydrochloric acid in the stomach?

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11How does bile increase enzyme action in fat digestion?

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12What is the main benefit of both digestion and absorption occurring in the small intestine?

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13Why is it necessary for villi to have blood capillaries?

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14Why is aerobic respiration considered more efficient than anaerobic respiration?

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15What is the basic reason for lactic acid formation in muscles during heavy exercise?

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16What directly causes dough to rise during fermentation by yeast?

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17Which combination is most suitable for rapid gas exchange in alveoli?

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18If fluid accumulates in alveoli, what will happen to respiration?

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19Why does haemoglobin easily combine with oxygen in the lungs?

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20Why is carrying carbon dioxide only by binding to haemoglobin not considered enough?

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21Having four chambers in the human heart is most related to which need?

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22Why does blood pass through the heart twice in one complete cycle of double circulation?

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23Which structural difference is suitable because arteries have high pressure and veins have low pressure?

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24Why is a network of capillaries spread near tissues?

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25If platelets are very low, why can injury become more dangerous for survival?

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