Scientist study index fossils so they will get an understanding of what life was like back then.
This is an example of microevolution.
Microevolution represents a small change in the genetic structure of the population. These changes manifest through the change in the allele frequencies of genes like in the case of dung beetles.
The causes of microevolution are evolutionary mechanisms, natural selection, genetic drift, mutations and gene flow.
If you add a base the ph will increase
Answer:
Hydrogen atom of one molecule and carbon atom SPF another molecule