How many human teeth appear twice during the life span of an individual? |
|||||||
a) |
16 |
b) |
32 |
c) |
22 |
d) |
20 |
How many human teeth appear twice during the life span of an individual? |
|||||||
a) |
16 |
b) |
32 |
c) |
22 |
d) |
20 |
(d)
In human, 20 teeth (incisor, canine, premolar) are diphyodont, grow twice in life and 12 teeth (molars) are monophyodont, grow once in life.