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What are the changes in a person due to constant contact with the internet, mobile, phone?
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State the two main types of reproduction.
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Complete the diagram showing various processes in tissue culture.

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Redraw and complete the given chart.

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Write any two measures to conserve water.
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Solar water – heater works on renewable energy system
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Write a short note on pressure cooker.
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Suggest control measures of noise pollution
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What is the need to use eco-friendly technology?
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Explain the mechanism of hereditary changes.
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What are stem cells?
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Write the correct answer in blank circles.
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Answer the questions by observing the following figure.
A) Write the name of the device shown in the accompanying diagram.
B) Write briefly the work of this device.
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Observe the figure and answer the questions given below.
a) Name the reaction.
b) Where is this reaction used?
c) Which element is used in it?
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Fill in the blank:
______________ is a greenish coloured poisonous gas.
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Choose the correct alternative and rewrite the following:
Twenty dry raisins were soaked in 50 ml of water and kept for one hour at 500 C. Which out of the following is the correct observation?
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Define Heredity. Give two examples.
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Give one example of Reuse.
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