24.1 Flashcards
1
Q
life forms on earth share certain characteristics
A
composed of one or more cells
transfer energy to function and grow
encode hereditary informaiton
2
Q
geological timescale
A
4 eons:
divided into eras and periods
3
Q
fossil record is invaluable for studying earths history
A
relative dating: only option before isotope decay techniques were discovered
isotope decay rates allow us to determine absolute values
