Depending on the culture but in most western cultures it is considered ~18years
It is the study of growth from birth to adulthood
A person's height will increase from birth until adulthood, and in late adulthood, it may decrease.
150 to155
At birth 350, by adulthood 206.
the eye
Armadillos are sexually mature at one year of age.
Rabbits typically take about 6 months to mature and reach adulthood.
Tongo lizards are about 4cm at birth and 1 meter when it reaches adulthood.
As long as you are the legal age of adulthood.
BIG!!! it will look like its about to explode
Rabbits typically reach adulthood and maturity at around 5 to 6 months of age.
Check out thefelinediary.ucoz.com. It has a lot of helpful information about caring for kitten from birth to adulthood.