Homework Help: Biology

Posted by Corie on Tuesday, January 22, 2013 at 11:08am.

What is a molecular clock?

A)a tool scientists use to date fossils
B)a tool scientists use to determine how many mutations a species accumulates over time
C)a tool scientists use to determine how long two species have been evolving independently
D)a tool scientists use to determine how long it takes to sequence a strand of DNA

My Answer: A
I think B could be a possibility too but Im pretty sure its A.

Biology - Ms. Sue, Tuesday, January 22, 2013 at 11:14am
I think there's a better answer.

http://en.wikipedia.org/wiki/Molecular_clock
Biology - Corie, Tuesday, January 22, 2013 at 11:16am
I think what it is saying there implies that its C. is that right? :)
Biology - Ms. Sue, Tuesday, January 22, 2013 at 11:18am
Yes, I think C is the best answer.
What does your book say?
Biology - Corie, Tuesday, January 22, 2013 at 11:33am
thanks :) I don't have one....

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