Question

Identify the odd one among the following and justify that.
(a) Bacteria; Insect; Earthworm; Hydra

Answer 1

• Bacteria are prokaryotes while others are eukaryotes.
• Bacteria lack a well-defined nucleus and membrane-bound cell organelles and so are grouped into prokaryotes.
• Organisms like insects, earthworms, hydra are multicellular organisms having well-defined nuclei with membrane-bound cell organelles and so are grouped into eukaryotes.