Metameric segmentation is the characteristic | vedclass

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(D) The correct answer is $D$. Metameric segmentation,or metamerism,refers to the linear repetition of body parts along the longitudinal axis of an an

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Annelida and Arthropoda

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(D) The correct answer is $D$. Metameric segmentation,or metamerism,refers to the linear repetition of body parts along the longitudinal axis of an animal. This phenomenon is a characteristic feature of the phyla $Annelida$,$Arthropoda$,and $Chordata$. In $Annelida$,segmentation is clearly visible both externally and internally. In $Arthropoda$,the body is segmented,although the segments are often fused to form tagmata. In $Chordata$,metamerism is prominent in the embryonic stage and persists in adult internal structures such as vertebrae,ribs,and nerves.

Genus Name	Two Characters	Phylum
$A$. Pila	$(i)$ Segmented body,$(ii)$ Radula in mouth	Mollusca
$B$. Asterias	$(i)$ Spiny skin,$(ii)$ Water vascular system	Echinodermata
$C$. Sycon	$(i)$ Pore-bearing,$(ii)$ Canal system	Porifera
$D$. Periplaneta	$(i)$ Jointed appendages,$(ii)$ Chitinous exoskeleton	Arthropoda

Metameric segmentation is the characteristic of

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