Which of the following organisms can not multiply by fragmentation?

Correct option is D

Ans. (d) Single-celled organisms

Sol.Fragmentation is a type of asexual reproduction where an organism breaks into fragments, and each fragment grows into a new individual. This process typically occurs in multicellular organisms such as filamentous algae, fungi, and some lower animals like Planaria. However, single-celled organisms do not reproduce by fragmentation because they consist of just one cell. Instead, they reproduce through processes like binary fission, budding, or multiple fission.

Information Booster (Static Facts about Fragmentation)

• Fungi – Many fungi reproduce through fragmentation, where hyphae break and develop into new fungal colonies.
• Filamentous Algae – Algae such as Spirogyra reproduce by fragmentation; each fragment grows into a new filament.
• Planaria – A type of flatworm that can regenerate into new individuals when cut into pieces.
• Single-celled organisms – They cannot reproduce by fragmentation as they lack a multicellular body structure; they typically reproduce through binary fission (e.g., bacteria, amoeba).