Question

Which teeth are different in shape size and function then these are called as
A) Acordont
B) Pleurodont
C) Homodont
D) Heterodont

Answer 1

Hint:The mode of development and arrangement of teeth within the buccal cavity is known as Dentition. Dentition is very much different compared to all forms of vertebrates. Mode of arrangement of teeth depends on the mode of nourishment. All vertebrates except most of the aves have dentition based on the food they consume, whereas the aves (birds) have modified type of beak arrangement based on the mode of feeding Darwin's finches is a very good example of this phenomenon.

Complete answer:
As per the question, the mode of arrangement of teeth which differ in their shape, size and functions and its phenotype is conserved within the species, such mode of dentition is called as Heterodont. As the name suggest Hetero means different and dont means dentition. Acrodont refers to the formation of teeth found within the alveolar ridge of the jaw without sockets, Pisces exhibit acrodont nature. Pleurodont is a phenotypic arrangement where the teeth are found attached to the sides of the mandible without sockets like in case of lizards and other reptiles.
Homodont as the name suggests Homo means Same and Dont means Teeth, that is arrangement of teeth within the buccal cavity with similar type of teeth, this mode of arrangement is seen in some pisces and amphibians.

Therefore,Option D is the correct answer.

Note:In vertebrates, Humans exhibit this mode of dentition, with dental formula 2/2 incisors, 1/1 canines, 3/3 premolars and 2/2 molars. This is represented as (I 2/2 + C1/1 + P 3/3 + M 2/2) x 2 = 32 in total. This is the typical number of teeth found in mammals which is around 44.