How many chambers are present in the heart of fishes and frogs?
- AFishes: $2$,Frogs: $3$
- BFishes: $3$,Frogs: $2$
- CFishes: $2$,Frogs: $4$
- DFishes: $4$,Frogs: $3$
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Classify the following organisms based on the absence $/$ presence of true coelom,i.e.,acoelomate,pseudocoelomate,and coelomate:
$(a)$ Scorpion
$(b)$ Sea anemone
$(c)$ Ascaris
$(d)$ Earthworm
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$(f)$ Nereis
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