Which physical structures are present in amphibians, but not in reptiles, when they first hatch

In this assignment, you will analyze an example of speciation by researching the finches of the galapagos islands. then you will answer questions to construct explanations and draw conclusions based on the information you gather. someone plz !

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

What is the function of the nucleus in the euglena cells you observed?