Question

Premolars in humans


a. Cannot be described as diphyodont

b.Are not thecodont in nature

c.Are present only in upper jaw

d.Are involved exclusively in tearing andcutting of food but not grinding andmastication​

Answer 1

Answer:

a

Explanation:

Premolars are not diphyodont as they come only one once in life time

Answer 2

Answer:

this is example

Explanation:

In human, teeth are diphyodont, thecodont and heterodont. Humans have two sets of teeth during their life, i.e., one temporary set and one permanent set. A set of temporary milk or deciduous teeth is replaced by a set of permanent or adult teeth. Such type of dentition is called diphyodont.

Each tooth is embedded in a socket of the jaw bone. This type of teeth attachment is called thecodont.

An adult human has 32 permanent teeth which are of four different types, namely incisors, canine, premolars, and molars. Such type of dentition is called Heterodont dentition.