I need help with the question

Look at the picture below . what does this picture represent ?

Dna. we have heard that we are a product of our dna. but where is it? how do we "get" our dna? it is passed to us, from our parents, but in what form? several vocabulary words associated with inheritance are used interchangeably and sometimes, incorrectly. let's see if you can clear this up for someone just learning about inheritance and cell structure.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.