Which one of these is not a eukaryote?
Anabaena
The correct option is B.
Explanation of correct option:
Explanation of incorrect option:
Option A
Euglena is a photosynthetic eukaryotic organism.
Option C
Spirogyra is a eukaryotic cell. It is free-floating green algae.
Option D
Agaricus are eukaryotes. It is type of mushroom which comes under fungi kingdom.
Final answer: Anabaena is not a eukaryote.