Can you tell the age of a raccoon by the rings on his tail?
No you can not tell by the rings on its tail, it is just simply there you can tell the age by the size!
To tell a tree's age, you must first cut it open, by usually cutting off the trunk of the tree or a big branch. Then, if you look at the top of the trunk or branch, you will see numerous (or very little) wobbly rings. Count the number of rings, and that is the age. One ring equals one year of age. If there are forty rings, it is forty years old, and so forth.
I think this question is incorrect, and should be What can be determined by the number of rings of a trees trunk; the answer of which is the age. Light and dark bands formed in the trunk equate to the summer and winter growth patterns of the tree. Count the dark (or light) rings and you can tell the age of the tree in years.
Experience is just about the only way most people can judge the age of a goldfish. It is possible to tell if you are prepared to risk damaging the fish and can get a scale. Then using a microscope you can count the rings on it as you would the rings on/in a tree. This will give you growth spurts and seasons.
There is no way to tell the exact age of a cactus. Unlike trees you can count rings, but for cacti some believe like the saguaro cactus you can use the arms to tell the age, but in the life span of a saguaro it can grow at different rates. if you have to estimate a saguaro it takes the base an average of about 60 years to grow to the size of a male…