Question 29
Open your mouth, look into a mirror and try to count the different types of teeth in your mouth. Compare them with Figure 2.3 on page 13 of your NCERT textbook. Record your

Fig 2.3 of NCERT - Arrangement of teeth and different type of teeth.

observations in the table below:
(a) Did you observe any difference in the number of teeth? If yes, could you identify which type of teeth showed the difference?
(b) Compare the number and type of teeth in an adult (say your parents or cousins who have reached the age of 25-30 or more). Note your observation.

Open in App

Solution

Children have 28 teeth in their mouth. There are only four molars in each jaw and not six. Adults have six molars in each jaw.

Suggest Corrections

Similar questions

Q. The pointed teeth in your mouth are

(a) permolars
(b) incisors
(c) molars
(d) canines

Q. Match the following:

\begin{matrix} Types of Teeth & Functions i) Incisors & A) Piercing and tearing ii) Canines & B) Grinding food iii) Premolars & C) Cutting and biting iv) Molars & D) Crushing food \end{matrix}

Question 2
Which of the following pair of teeth differ in structure but are similar in function?

(a) Canines and incisors
(b) Molars and premolars
(c) Incisors and molars
(d) Premolars and canines

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

Which one of the following pairs of types of teeth perform one common function as stated against it ?

(a) Incisors, canines - Holding

(b) Canines, premolars - Tearing

(d) Molars, incisors - Tearing

Join BYJU'S Learning Program