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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 3 · 25 questions

Practice questions

01If a plant has enough light but guard cells of the leaf remain flaccid continuously what is the most logical effect on photosynthesis?

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02A leaf has chlorophyll and water but carbon dioxide is unavailable. Why will starch formation not occur?

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03Why is it considered necessary to keep a plant in darkness first in a photosynthesis experiment?

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04If only one part of a leaf receives light and the rest remains covered what conclusion is correct in the iodine test?

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05In which situation will a plant try to protect itself by closing stomata and this will negatively affect food formation?

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06In human digestion saliva acts on starch but why may this action stop in the stomach?

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07If mucus is not produced in the stomach what problem can the presence of acid and enzymes cause?

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08What is the correct sequence of roles of bile and pancreatic juice in fat digestion?

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09If bile does not reach the small intestine but pancreatic juice does why will fat digestion still be weak?

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10Why are villi and tiny blood vessels together important in the small intestine?

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11If digestion is occurring in the small intestine but villi are damaged why will the body get less energy?

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12Why is wave like muscular movement necessary in the food pipe even though gravity exists?

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13If water absorption in the large intestine becomes excessive what will happen to faeces?

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14What is the most basic reason for the energy difference between aerobic and anaerobic respiration?

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15Pain and cramps in muscles during hard exercise are related to which incomplete energy process?

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16What is one correct difference between fermentation in yeast and anaerobic respiration in muscles?

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17If alveolar walls become thick and surface area decreases why can energy production in the body fall?

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18When haemoglobin is low why can weakness occur even if lungs are working properly?

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19Why can carbon dioxide be linked not only with respiration but also with excretion?

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20Why is separation of oxygenated and deoxygenated blood in the human heart necessary for high energy life?

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21Thick elastic walls in arteries and valves in veins are related to which main difference?

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22If valves in veins do not work why can blood pooling in legs become more likely?

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23Capillaries are not only a path between arteries and veins but are the site of which main function?

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24Deficiency of platelets affects not just blood amount but which protective process?

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25If water does not move upward in xylem which two leaf processes can be affected?

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