Crown of teeth is covered by:

Dentine

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Enamel

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Both A and B

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Cementum

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Solution

The correct option is B Enamel
Enamel makes up the visible part of the tooth, covering the crown. It is the hardest substance in the human body and contains the highest percentage of minerals.
Thus, the correct answer is option B.

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Q. Both the crown and root of tooth is covered by a hard bony substance is called

Q. Both the crown and root of a tooth is covered by a layer of a bony hard substance called:

______ covers the crown of the tooth.

If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.
(a) What is W known as ?
(b) What is (i) X, and (ii) Y ?
(c) What are organisms Z ?
(d) State one way of removing layer W from the teeth.

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Crown of teeth is covered by:

The correct option is B EnamelEnamel makes up the visible part of the tooth, covering the crown. It is the hardest substance in the human body and contains the highest percentage of minerals. Thus, the correct answer is option B.

The correct option is B Enamel
Enamel makes up the visible part of the tooth, covering the crown. It is the hardest substance in the human body and contains the highest percentage of minerals.
Thus, the correct answer is option B.