Here's why:

* Eukaryotic cells have a true nucleus that contains their DNA. They also have other membrane-bound organelles like mitochondria, Golgi apparatus, and endoplasmic reticulum.

* Prokaryotic cells are simpler, lacking a nucleus and other internal membrane-bound organelles. Their DNA is located in a region called the nucleoid.

Frogs, like all animals, are made up of eukaryotic cells.