Top Posters
Since Sunday
5
a
5
k
5
c
5
B
5
l
5
C
4
s
4
a
4
t
4
i
4
r
4
Home Q & A Board Biology-Related Homework Help Cell Biology
New Topic  
travis travis
wrote...
Go to Answer
Posts: 320
Rep: 15 0
5 years ago
The 13C/12C isotopic ratio of geological rocks of different ages has been used to examine whether previous biological activity occurred because compounds of biological origin
A) do NOT contain 13C.
B) have a higher proportion of 13C that compounds of geological origin.
C) have a lower proportion of 13C that compounds of geological origin.
D) are not well preserved in geological samples.
Read 41 times
3 Replies
Replies
Answer verified by a subject expert
pmiller12pmiller12
wrote...
#1
Posts: 183
Rep: 29 0
5 years ago
Sign in or Sign up in seconds to unlock everything for free

Related Topics

travis Author
wrote...
#2
5 years ago
Thank you for your assistance, again and again
wrote...
#3
5 years ago
My pleasure
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1290 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 1081
  
 484
  
 260
Your Opinion
Which 'study break' activity do you find most distracting?
Votes: 741
Previous poll results: Do you believe in global warming?