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Question
Thorn of Bougainvillea and tendril of Cucurbita are an example of:
Thorn of Bougainvillea and tendril of Cucurbita are an example of:
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Solution
The correct option is D Homologous organs
Homologous organs are those organs which have the same basic structure (or same basic design) but different functions. Hence, they have common ancestor or origin. Both the thorns of bougainvillea and tendrils of Cucurbita origin from the stem and are modified from the auxiliary buds but their functions are different.
Analogous organs are the opposite of homologous organs, which have similar functions but different origins. An example of an analogous trait would be the wings of insects, bats, and birds that evolved independently in each lineage separately after diverging from an ancestor without wings.
The human body has a few unneeded parts. We no longer rely on these organs or structures for any serious function, or they have atrophied or degenerated to the point that they don’t serve the function they used to. For example, the appendix is a vestigial organ in humans.
Retrogressive Evolution: This is the process in which complex forms of organisms develop towards the simpler structural and physiological organizations. For eg - Monocot plants are considered as more advanced groups of plants with a simple structure and herbaceous habit.
Homologous organs are those organs which have the same basic structure (or same basic design) but different functions. Hence, they have common ancestor or origin. Both the thorns of bougainvillea and tendrils of Cucurbita origin from the stem and are modified from the auxiliary buds but their functions are different.
Analogous organs are the opposite of homologous organs, which have similar functions but different origins. An example of an analogous trait would be the wings of insects, bats, and birds that evolved independently in each lineage separately after diverging from an ancestor without wings.
The human body has a few unneeded parts. We no longer rely on these organs or structures for any serious function, or they have atrophied or degenerated to the point that they don’t serve the function they used to. For example, the appendix is a vestigial organ in humans.
Retrogressive Evolution: This is the process in which complex forms of organisms develop towards the simpler structural and physiological organizations. For eg - Monocot plants are considered as more advanced groups of plants with a simple structure and herbaceous habit.
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