Sedimentary Rock
Here's Why:
Fossils also form from molds and casts. If an organism completely dissolves in sedimentary rock, it can leave an impression of its exterior in the rock, called an external mold.
I got this information from http://www.livescience.com/37781-how-do-fossils
I hope this helps:)
Answer:
Its C
Explanation:
That's the answer on Edge
Chromosome are made of DNA.
alleles are the different forms of a gene that can exist.
chromosomes contain genes that control the inheritance of traits.
