Which of the following is unrelated to the others?

  • A
    Sea Cucumber
  • B
    Sea Star
  • C
    Sea Urchin
  • D
    Sea Squid

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Similar Questions

Column $-I$ represents the animal class, while Column $-II$ represents the exoskeleton. Choose the correct option:
Column $-I$Column $-II$
$(A)$ Cartilaginous fishes$(i)$ Cycloid scales
$(B)$ Bony fishes$(ii)$ Epidermal scales
$(C)$ Reptiles$(iii)$ Placoid scales

Match the following columns and select the correct option:
Column-$I$ Column-$II$
$(a)$ Gregarious pest $(i)$ Asterias
$(b)$ Radial symmetry in adults and bilateral symmetry in larvae $(ii)$ Scorpion
$(c)$ Book lungs $(iii)$ Ctenoplana
$(d)$ Bioluminescence $(iv)$ Locusta

Which of the following options represents the correct ascending order of complexity in animal body organization?

Select the correct match for $X$ and $Y$:
Column $X$Column $Y$
$(1)$ Green gland$(P)$ Mollusca
$(2)$ Digestive tract with digestive glands$(Q)$ Arthropoda
$(3)$ Straight or coiled alimentary canal$(R)$ Hemichordata
$(4)$ Straight or $U$-shaped digestive tract$(S)$ Echinodermata

Which of the following is common among a leech,a mosquito,a bed bug,and a rat?

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