DENDROLOGY AND SOCIETY
MORPHOLOGY AND IDENTIFICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is common between the thorn of Bougainvillea and tendril of cucurbits (cucumber, pumpkin)? Select the most appropriate answer.
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They have nothing in common
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Both grow on stems
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Both are modified axillary buds
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Both are modified leaves
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Explanation:
Detailed explanation-1: -Cucurbita tendrils and Bougainvillea thorns have same origin i.e. Axillary buds.
Detailed explanation-2: -Thorns and tendrils of Bougainvillea and Cucurbita represent homology.
Detailed explanation-3: -In Bougainvillea, thorns are the modifications of stem in which axillary buds of stems get modified into woody, straight and pointed thorns. These thorns protect the plants from browsing animals. Q.
Detailed explanation-4: -Correct option b homologous organs ExplanationTnorns of Bougainvillea and tendrils of Cucurbita are homologous organs. These are modified branches and are axillary in position.
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