Here's why:

* Eukaryotic cells have a true nucleus, which contains their genetic material (DNA). They also have other membrane-bound organelles like mitochondria, chloroplasts (in plants), and a Golgi apparatus.

* Prokaryotic cells lack a nucleus and other membrane-bound organelles. They have their DNA in a single circular chromosome located in the cytoplasm.

Dandelions, like all plants, are multicellular organisms made up of eukaryotic cells. They have a nucleus, chloroplasts for photosynthesis, and other organelles characteristic of eukaryotes.