Question

Which one of these is not a eukaryote?

• A. Euglena
• B. Anabaena
• C. Spirogyra
• D. Agaricus
  
  

Answer 1

The correct option is B

Anabaena

• Eukaryotes are organisms whose cells have a nucleus enclosed within membranes, unlike prokaryotes, which have no membrane-bound organelles.
  
• Anabaena is a genus of filamentous cyanobacteria that exist as plankton. They are known for nitrogen-fixing abilities and are prokaryotes.
  
• Euglena is a genus of single-cell flagellate eukaryotes.
• Spirogyra is a filamentous chlorophyte green algae, which is also a eukaryote.
  
• Agaricus is a genus of mushrooms containing both edible and poisonous species, and are eukaryotes.
• So the correct option is B.