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(D) Segmentation (metamerism) is a characteristic feature where the body is divided into repeating units.$1$. $Earthworm$ $(Annelida)$ shows true meta

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Starfish/Hydra

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(D) Segmentation (metamerism) is a characteristic feature where the body is divided into repeating units.$1$. $Earthworm$ $(Annelida)$ shows true metameric segmentation.$2$. $Cockroach$ $(Arthropoda)$ shows segmentation in the body,which is divided into head,thorax,and abdomen.$3$. $Frog$ $(Chordata)$ shows internal segmentation in the vertebral column and muscles.$4$. $Starfish$ $(Echinodermata)$ and $Hydra$ $(Cnidaria)$ do not show true body segmentation. $Hydra$ is a diploblastic,radially symmetrical organism without segments,and $Starfish$ exhibits pentamerous radial symmetry without metameric segmentation.

$(a)$ Ophiura	$(i)$ Mollusca
$(b)$ Physalia	$(ii)$ Platyhelminthes
$(c)$ Pinctada	$(iii)$ Echinodermata
$(d)$ Planaria	$(iv)$ Coelenterata

Which of the following organisms does not show any body segmentation?

Similar Questions

Which invertebrate animals possess a calcium carbonate skeleton?

Match the following genera with their respective phylum:
$(a)$ Ophiura $(i)$ Mollusca
$(b)$ Physalia $(ii)$ Platyhelminthes
$(c)$ Pinctada $(iii)$ Echinodermata
$(d)$ Planaria $(iv)$ Coelenterata

Select the correct option:

Which of the following characteristics is $NOT$ shared by birds and mammals?

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Classify the following animals based on their body symmetry (radial or bilateral): Coelenterates,Ctenophores,Annelids,Arthropods,and Echinoderms.

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