Excretory Products and their EliminationHard
Question
Which one of the following pair of items correctly belongs to the category of organs mentioned against it ?
Options
A.Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
B.Nictitating membrane ans blind spot in human eye - Vestigoal organs
C.Nephridia of earthworm abd Malpighian tubules of cockroach - Excretory organs
D.Wings of honey bee and wings of crow - Homologous organs
Solution
In annelids like Nereis, earthworm, leech etc the tubular coiled structurres called nephridia are excretory organs. In phylum-Analogous, insects centipedes, millipedes and arechnides possess Malpighian tubules as their principal excretory organ.
Analogous organs have almost similar appearance and perform the same funcction but develop in totally different groups and are totally different in their basic structure and developmental origin, eg, wings of butterfly, birds, bats.
The homologous have common origin, perform varied functions and have different appearance, eg, thorns of Bougainvillea and tendrils of Cucurbita.
Vestigoal organsare useless remnants, which might have been large and functional in the ancestors, eg, Nictitating membrane, vermiform appendix etc.
Analogous organs have almost similar appearance and perform the same funcction but develop in totally different groups and are totally different in their basic structure and developmental origin, eg, wings of butterfly, birds, bats.
The homologous have common origin, perform varied functions and have different appearance, eg, thorns of Bougainvillea and tendrils of Cucurbita.
Vestigoal organsare useless remnants, which might have been large and functional in the ancestors, eg, Nictitating membrane, vermiform appendix etc.
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