Q. Calcium (Ca) and phosphorus (P₄) are essential for

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Q. Internal skeleton is made up of bones and cartilage in

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Q. In mammals, bones and cartilage result in

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Q. Innermost layer of eyeball is

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Q. Runny nose and crying may be the outcomes of

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Q. Internal reflection of light is prevented through the

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Q. Function of eyelids includes

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Q. Greatest refraction of light is caused through

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Q. Rectus muscles are used to

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Q. Pupil is located inside the

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Q. Friction between eyelid and exposed part of eye ball is reduced through

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Q. Excess tears drain into

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Q. Jejunum and duodenum can not be distinguished in

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Q. Which one is characteristics of gland

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Q. Glands normally produce

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Q. In mammals, Larynx refers to the

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Q. Amount of light entering eye is controlled through

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Q. Eyeball is kept firm and refracting light through

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Q. In the outer corner of the upper lid of eye, is the

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Q. Tears are spread over the eyeball with the help of

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