Question

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 questions:
i) In frogs, all the teeth in the upper jaw look alike, whereas in human beings they are
different. The type of dentition in man 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

Answer 1

i) In frogs, all the teeth in the upper jaw look alike, whereas in human beings they are different.

The type of dentition in man can be called Heterodont.

This means that all teeth are different specially designed for different purposes.

ii) The dental formula of a mammal is written as ICPM =2023/1023.

The teeth missing in it are canines. They are the teeth between incisors and premolars of the mammals.

They are generally enlarged in carnivores.