Are spine of cactus and thorn of lemon plant homologous organs ?explain.

Asked by akankshyasahu | 6th Feb, 2010, 12:15: PM

Expert Answer:

Thorns and spines seen in plants are analogous structures. Both are pointed structures that are protective in function. However, thorn is modification of stem and spine is modified leaf. Hence they are analogous and not homologous.

Answered by  | 9th Feb, 2010, 07:20: AM

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