While plants are incredibly diverse, they all share fundamental characteristics that define them as plants:

* They are eukaryotes: meaning they have cells with a nucleus and other membrane-bound organelles.

* They are multicellular: meaning they are made up of many cells.

* They are autotrophs: meaning they produce their own food through photosynthesis.

* They have cell walls made of cellulose: a strong, fibrous material that gives them structure.

* They have chloroplasts: the organelles responsible for photosynthesis.

These shared characteristics are what set plants apart from other organisms. So, while plants may appear vastly different, they have a common underlying biology.