Question 6 options: The most commonly thought of fossil is when (blank)

seep in over time and replace the (blank)

and other hard tissues of dead animals, leaving stone in the shape of their skeleton.

Permineralization.

Explanation:

Fossils is the marks or part of body left of the organisms when they were alive. It is remains of the organisms on the land. Scientists collect these fossils to study about the different creatures that were once present in the earth. The process of collecting and fossilization is called permineralization.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion