2. If you measured the age of a fossil using "C dating and determined its age to be about 17000 years old, how much of the rock should be made of 14N?

is in the form atp or adenosine triphosphate

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.  

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.