Since this is not my area of expertise, I searched Google under the key words "when the first vertebrates evolved" to get these possible sources:
https://www.google.com/search?client=safari&rls=en&q=when+the+first+vertebrates+evolved&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
if you wanted to consult the geologic time scale for when the first vertebrates evolved, where would you look?
4 answers
B
A
A
C
C
if im wrong let me know
A
A
C
C
if im wrong let me know
how does that help i need much more help then that
We need the test with 17 answers
4 answers