Please select a subject first
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Describe in brief how urine is produced in the human body.
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The process of diffusion of solvent particles from the region of less solute concentration to a region of high solute concentration through a semi-permeable membrane is known as ____________.
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Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
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In a person the tubule part of the nephron is not functioning at all. What will its effect be on urine formation?
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“All plants give out oxygen during the day and carbon dioxide during the night”. Do you agree with this statement? Give a reason.
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Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons.
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If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.
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What would happen if green plants disappeared from earth?
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Leaves of a healthy potted plant were coated with vaseline. Will this plant remain healthy for long? Give reasons for your answer.
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Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?
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Explain the importance of soil for plant growth.
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What is the purpose of making urine in the human body?
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Name the organs that store and release the urine.
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Give two examples of different types of global exchanges which took place before the seventeenth century, choosing one example from Asia and one from the Americas.
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Explain how the global transfer of disease in the pre-modern world helped in the colonisation of the Americas.
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Write a note to explain the effects of the following:
The coming of rinderpest to Africa.
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Multiple choice questions.
Which of these statements is not a valid reason for the depletion of flora and fauna?
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Answer the following questions in about 30 words.
How have human activities affected the depletion of flora and fauna? Explain.
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Answer the following question in about 120 words.
Describe the geographical conditions required for the growth of rice.
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Here are three reactions to the language policy followed in India. Give an argument and an example to support any of these positions.
Sangeeta: The policy of accommodation has strengthened national unity.
Arman: Language-based States have divided us by making everyone conscious of their language.
Harish: This policy has only helped to consolidate the dominance of English over all other languages.
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