Generated by claude-sonnet-4-6 · 2026-06-15 06:42 · grounding rag
Model Answer
(i) Sugarcane reproduces through vegetative propagation (a type of asexual reproduction). New plants are grown from stem cuttings (nodes) of the parent plant.
(ii) Two advantages of vegetative propagation:
- All offspring are genetically identical to the parent, preserving desirable traits.
- Plants can be grown without seeds and mature faster than seed-grown plants.
(iii) Two more examples of plants reproducing by vegetative propagation:
- Rose (stem cuttings)
- Potato (tubers/eyes)
(iv) Regeneration is not possible in all animals because many multicellular animals have cells organised into specialised tissues and organs, placed at definite positions in the body. Simple cell-by-cell division is impractical in such complex body organisations. Only simpler organisms like Planaria, which have less specialised organisation, can regenerate.
Source: Chapter 7, Section 7.2.2 Fragmentation / Modes of Reproduction
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Explanation
- (i) Examiners expect the term "vegetative propagation" — just saying "asexual" alone is incomplete.
- (ii) The two most credited advantages are genetic uniformity/preservation of traits and faster/seedless growth.
- (iii) Any two valid examples with the plant part used scores full marks. Rose, potato, ginger, banana, bryophyllum are all acceptable.
- (iv) The key idea from the textbook is: specialised cells form tissues → tissues form organs → organs occupy definite positions → cell-by-cell division becomes impractical. Always connect complexity of body organisation to inability to regenerate.