To find out how old a tree is, saw its trunk and count the number of annual rings. How to calculate the age of animals? Give examples .

Different species of animals show different signs of age. Without knowing these signs, we can determine the age by the teeth of the animal (depending on how worn they are) or by the bones (if the animal is already dead). So we can find out the age of fish or mollusks by the annual rings on the scales and shell.