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Among pea tendril, lemon thorn and Opuntia spines, which one are homologous structures?
- a)Opuntia and lemon thorn
- b)Pea tendrils and Opuntia spines
- c)Pea tendrils and lemon thorn
- d)All of these
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Among pea tendril, lemon thorn and Opuntia spines, which one are homol...
Homologous organs
Thorns of Bougainvillea and tendrils of Cucurbita are homologous organs. These are modified branches and are axillary in position. It means axillary branches in Bougainvillea are modified into thorns for protection from burrowing animals and in Cucurbita into tendrils for climbing.
The analogous organs have the almost similar appearance and perform the same function but t these develop in totally different groups and are totally different in their basic structure and development origin. The phyllode of Ruscus or cladode of Asparagus is analogous to leaves of other plants.
The vesigial or rudimentary organs are useless remnants of structures of organs. which might have been large and functional in ancestors, eg, cutin covered stomata on the stem of cactiplants.
Thorns of Bougainvillea and tendrils of Cucurbita are homologous organs. These are modified branches and are axillary in position. It means axillary branches in Bougainvillea are modified into thorns for protection from burrowing animals and in Cucurbita into tendrils for climbing.
The analogous organs have the almost similar appearance and perform the same function but t these develop in totally different groups and are totally different in their basic structure and development origin. The phyllode of Ruscus or cladode of Asparagus is analogous to leaves of other plants.
The vesigial or rudimentary organs are useless remnants of structures of organs. which might have been large and functional in ancestors, eg, cutin covered stomata on the stem of cactiplants. CORRECT OPTION IS (B).
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Among pea tendril, lemon thorn and Opuntia spines, which one are homol...
Pea tendrils and spine of opuntia are modifications of leaf so they are homologous whereas thorns in lemon are stem modification, so the answer would be B
Community Answer
Among pea tendril, lemon thorn and Opuntia spines, which one are homol...
Homologous structures
Homologous structures are anatomical similarities between different species that are due to shared ancestry. In this case, the homologous structures among pea tendril, lemon thorn, and Opuntia spines are:
Pea tendrils and Opuntia spines
- Pea tendrils are thin, spiraling structures that help the plant climb and support itself.
- Opuntia spines are modified leaves that serve a similar function of protecting the plant and deterring herbivores.
- Both structures have a similar function of aiding in plant support and protection, despite their different forms.
Therefore, pea tendrils and Opuntia spines are homologous structures because they have a common evolutionary origin, even though they may look different in appearance.
Homologous structures are anatomical similarities between different species that are due to shared ancestry. In this case, the homologous structures among pea tendril, lemon thorn, and Opuntia spines are:
Pea tendrils and Opuntia spines
- Pea tendrils are thin, spiraling structures that help the plant climb and support itself.
- Opuntia spines are modified leaves that serve a similar function of protecting the plant and deterring herbivores.
- Both structures have a similar function of aiding in plant support and protection, despite their different forms.
Therefore, pea tendrils and Opuntia spines are homologous structures because they have a common evolutionary origin, even though they may look different in appearance.
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Among pea tendril, lemon thorn and Opuntia spines, which one are homologous structures?a)Opuntia and lemon thornb)Pea tendrils and Opuntia spinesc)Pea tendrils and lemon thornd)All of theseCorrect answer is option 'B'. Can you explain this answer?
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