Name three components of bones and describe their function.

1st the periostneum which is the outside of the bone and a thin but dense layer that has nerves and blood vessels

2nd compact bone. It is very smooth and very hard

3rd and lastly Cancellous, this looks a little like a sponge but much harder.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.