Insects or other small organisms that were trapped in tree sap thousands of years ago can remain unchanged, even after the sap turns into a hard material called amber.

As delicate and ________ as insect bodies are, it is remarkable that over the ages enough of them have ______, preserved in amber, for scientists to trace insect evolution.Question 37Select one:a.Beautiful -------- disappearedb.Refined -------- awakenedc.Impervious ------ multipliedd.Fragile --------- survivede.Indestructible -------- evolved

Which of the following is NOT true of amber?Pregunta 32RespuestaA.It may contain the remains of tiny animals.B.It is basically the same as it was millions of years ago.C.It is composed of an organic material.D.It is made by a process of mineral replacement.

Can a forest regenerate naturally in a short period of time?

Organisms contain carbonglossary term (opens in a new window). Sometimes, when an organism dies, the carbon in its body starts to break down. Some of the original material is decayed; however, the carbon also forms a dark coating on top of the dead organism. This preserves the organism’s body as a carbonized fossil. Carbonized organisms can be so well preserved, even details like the patterns or colors of skin or leaves can remain.

What name is given to the remains of organisms that lived many years ago, found in rocks?