This is called Biomagnification - concentration of toxins in an organism as a result of its ingesting other plants or animals in which the toxins are more widely disbursed.
Answer:
a fossil that is useful for dating and correlating the strata in which it is found.
Explanation:
Maybe D I hope it helps you
It shows the evolution of certain species through the bone structures of the fossils.
The term that is used to describe a chemical reaction in which water is produced or gained I believe is Dehydration Synthesis.