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Types of Teeth

The third mol...

Question

The third molar in the human jaw is called .

A

Milk teeth

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B

Crushing teeth

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C

Wisdom teeth

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D

Permanent teeth

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Solution

The correct option is C Wisdom teeth
Wisdom tooth is the third molar and the last to erupt on each side of the upper and lower jaws in humans. Most people have four wisdom teeth at the back of the mouth — two on the top, two on the bottom.
Milk teeth are the first set of teeth that develops in an infant. Milk teeth are eventually replaced by permanent teeth.

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Q. Study the following passage:
Most of the vertebrates have jaws with teeth. The mode of arrangement of teeth on the jaws is called dentition.
The various types of teeth seen in mammals are incisors (I) canines (C) premolars (P) and molars (M). They are used for biting, tearing, chewing and grinding, respectively.
Canines, the tearing teeth are well-developed in carnivores and ill-developed or absent in herbivores.

Now answer the following:
(i) In frogs, all the teeth in the upper jaw look-alike, whereas in human beings they are different. The type of dentition in human beings can be called .........
(a) Homodont (b) Isodont (c) Heterodont (d) Acrodont
(ii) The dental formula of a mammal is written as ICPM=2023/1023. The teeth missing in it are ................
(a) Incisors (b) Canines (c) Premolars (d) Molars

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