Correct option is B
The correct answer is: (B) They have specialised cells organised into tissues and organs.
Fragmentation is a type of asexual reproduction where an organism splits into fragments, and each fragment develops into a new individual.
This mode of reproduction is commonly seen in simple organisms like spirogyra (a filamentous alga) and some invertebrates.
Presence of Specialised Cells, Tissues, and Organs:
- Multicellular organisms like animals and complex plants have specialised cells that perform specific functions, making fragmentation an ineffective mode of reproduction.
- In higher organisms, cells are organised into tissues, which further form organs and organ systems.
Higher Complexity in Body Structure
- Unlike simple organisms, higher multicellular organisms require coordinated functioning of different organs and systems (e.g., circulatory, nervous, and digestive systems in animals).
- Unlike simple organisms, higher multicellular organisms require coordinated functioning of different organs and systems (e.g., circulatory, nervous, and digestive systems in animals).
Fragmentation is Limited to Simple Organisms
- Organisms like planaria and spirogyra can regenerate from fragments because they have relatively simple body structures with totipotent cells (cells capable of growing into a complete organism).
- Organisms like planaria and spirogyra can regenerate from fragments because they have relatively simple body structures with totipotent cells (cells capable of growing into a complete organism).
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