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What are the disadvantages of not having bony skeleton?

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Name the organism which can make their own food?

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How fungi get their food?

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Describe the need and importance of classification?

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Write any 4 characteristics of worms and algae?

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Differentiate between monocots and dicots?

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Differentiate between vertebrates and invertebrates?

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Write down the names of the seven colours present in light.

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Write a note on Ibn al Haytham.

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What make up the white light

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What is refraction of light.

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What is a pinhole camera

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What is sound? How is it travel.

asked Jan 16, 2019 in Science by danish (1.0m points)

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How noise and musical notes are produced.

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Define hertz.

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How bats uses echoes to find the way.

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What is an echo? How it is produced.

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What is a medium.

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.Define frequency.

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What is the sound range of human ears

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