Sexual dimorphism is observed in .....

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(D) Sexual dimorphism refers to the distinct morphological differences between the male and female individuals of the same species.In $Cockroach$ $(Pe

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Cockroach

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(D) Sexual dimorphism refers to the distinct morphological differences between the male and female individuals of the same species.In $Cockroach$ $(Periplaneta 	ext{ } americana)$, sexual dimorphism is clearly visible.Male cockroaches have long, thread-like anal styles, which are absent in females.Additionally, males are generally smaller than females and have longer wings that extend beyond the tip of the abdomen.$Hydra$, $Earthworm$, and $Sponge$ are generally hermaphroditic (bisexual) and do not exhibit distinct sexual dimorphism.

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