Question

The teeth which are different in shape, size and function are called as
a) Acrodont
b) Pleurodont
c) Homodont
d) Heterodont

Answer 1

Teeth are the hard, resistant structures present inside the buccal cavity of both animals and humans. They are used for catching, breaking large food molecules into smaller particles and sometimes in defence.

Complete answer:
Acrodont teeth are attached to the jaw and are not deep into the bone. They are the weakest forms of teeth. They are fused with the jaw bone and can be easily broken with a little force. These teeth are pointy and aid in chewing food. Acrodont teeth are found in the reptiles such as lizards, bearded dragons, etc.
Pleurodont teeth are attached like Acrodont teeth but they are anchored on the inside of the jaw. They have strong roots but have weaker attachment because they are not fused with the bone. The shape of Pleurodont teeth is round and flattened that aids in crushing molluscs like snails and clams. Pleurodont teeth are observed in some species of lizards, iguana, etc.
Homodont teeth are types of teeth that possess the same morphology, i.e., all the teeth in the jaw have the same shape, size and function. They are found in fish and some reptiles.
Heterodont teeth are a set of teeth that are different in shapes and size. Eat shape has its own set of functions varying from the other shape of teeth. All mammals possess Heterodont teeth. There are four shapes, incisors, canines, premolars and molars. Incisors are used for biting in the food. Canines are used for tearing. Premolars and molars aid in chewing and breaking the food particles.

Hence, the correct option is D.

Note:
Another type of teeth is codont teeth. These types of teeth are pointed cone shaped teeth that were present in the eels present in the class Codota. The members of this class are now extinct. The teeth are enclosed into the deep socket of the bone in this type.