Choose the best definition of a fossil. any trace of an organism that has been converted into rock the process that leads to pre
servation of any body part from an organism that lived in the past any trace of an organism that lived in the past a bone, tooth, shell, or other hard part of an organism that has been preserved
<span>The best definition of a fossil is any trace of an organism that lived in the past. Technically, a couple of the other choices (i.e. trace of an organism turned to rock, a hard part of an organism that has been preserved) could be considered within this group.</span>
Gamma rays because microwaves, visible light and radio waves wouldn’t come in handy if an astronomer would want to study the composition of planets and stars.
