Which of the following organisms exhibit eith | vedclass

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(D) $1$. $Platyhelminthes$ (flatworms) are generally hermaphroditic and exhibit internal fertilization.$2$. $Mollusca$ (mollusks) exhibit both interna

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$ (B) $ and $ (C) $ both

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(D) $1$. $Platyhelminthes$ (flatworms) are generally hermaphroditic and exhibit internal fertilization.$2$. $Mollusca$ (mollusks) exhibit both internal and external fertilization depending on the class (e.g.,bivalves often show external,while cephalopods show internal).$3$. $Chordata$ (chordates) exhibit both internal and external fertilization depending on the group (e.g.,most mammals show internal,while many bony fishes and amphibians show external).$4$. Therefore,both $Mollusca$ and $Chordata$ exhibit either internal or external fertilization.

Column-$I$	Column-$II$
$(a)$ Contractile vacuole	$(i)$ Excretory unit
$(b)$ Parapodia	$(ii)$ Food ingestion
$(c)$ Flame cells	$(iii)$ Locomotion
$(d)$ Nematocysts	$(iv)$ Osmoregulation

Which of the following organisms exhibit either internal or external fertilization?

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Match the following columns:
Column-$I$ Column-$II$
$(a)$ Contractile vacuole $(i)$ Excretory unit
$(b)$ Parapodia $(ii)$ Food ingestion
$(c)$ Flame cells $(iii)$ Locomotion
$(d)$ Nematocysts $(iv)$ Osmoregulation

Comb jellies are ..................... and jelly fishes are .................. respectively.

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