Sexual dimorphism is found in:

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(B) Sexual dimorphism refers to the condition where the two sexes of the same species exhibit different characteristics beyond the differences in thei

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Aschelminthes

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(B) Sexual dimorphism refers to the condition where the two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs. In the animal kingdom,members of the phylum $Aschelminthes$ (also known as $Nematoda$ or roundworms) exhibit distinct sexual dimorphism. In these organisms,males and females are separate (dioecious),and the males are often smaller than the females. In contrast,most members of $Platyhelminthes$,$Porifera$,and $Ctenophora$ are hermaphrodites (monoecious),meaning both male and female reproductive organs are present in the same individual.

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