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The eye defect ‘presbyopia’ can be corrected by
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What are the steps will you adopt for better waste management?
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What is the importance of rainwater harvesting?
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How does rainwater harvesting structures recharge ground water?
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Assertion: Rainwater harvesting is to collect and store rain water.
Reason: Rainwater can be directed to recharge the underground water source.
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Why is the circulation in man referred to as double circulation?
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What is the respiratory quotient?
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Initiation and stimulation of heartbeat take place by nerves.
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The closure of the mitral and tricuspid valves at the start of the ventricular systole produces the first sound ‘LUBB’.
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What are heart sounds? How are they produced?
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Why is the Sinoatrial node called the pacemaker of the heart?
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Differentiate between systole and diastole.
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Explain the conduction of heartbeat.
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Doctors use the stethoscope to hear the sound of the heart. Why?
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Explain the construction and working of a ‘Compound Microscope’.
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Value based question
List any three activities based on 4R approach to conserve natural resources.
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The Palk Strait and Gulf of Mannar separates India from ______.
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India is the ______ largest country with respect to area.
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The water body around the compact landmass was called ______.
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