Why are scale leaves of onion and spines of Opuntia called homologous organs?
Answers
Answer:
The differences in their function and also in their appearances are the result of divergence, due to adaptive radiation to different habit, habitat and ecological niche. These organs are called homologous organs.
Answer:
Although they have different functions, the underlying structure and development of these organs are homologous.
Explanation:
Scale leaves of onion and spines of Opuntia are called homologous organs because they have the same basic structural design and development, but differ in their functions. Homologous organs are those that have a similar structure or origin, but may have different functions. In the case of onion scale leaves and Opuntia spines, they both arise from the same tissue layer during plant development, known as the dermal tissue system. The basic structure of both organs includes a central vein or axis, surrounded by layers of cells. However, while the scale leaves of onion are adapted for photosynthesis and water conservation, the spines of Opuntia are modified for protection from herbivores and reducing water loss. Therefore, although they have different functions, the underlying structure and development of these organs are homologous.
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