Question

Classify the following organisms based on the absence/presence of true coelom (i.e., acoelomate, pseudocoelomate and coelomate): Spongilla, Sea anemone, Planaria, Liver fluke, Wuchereria, Ascaris, Nereis, Earthworm, Scorpion,

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Answer

Spongilla – Acoelomate

Sea anemone – Acoelomate

Planaria – Acoelomate

Liver fluke – Acoelomate

Wuchereria – Pseudocoelomate

Ascaris – Pseudocoelomate

Nereis – Coelomate

Scorpion – Coelomate

Earthworm – Coelomate

Birds, Fishes and Horse – Coelomate.

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Two groups of biology students were doing field work of taxonomy in a compost heap. Group A noticed an organism. They noted down its characteristics and made a dichotomous key. Group B noticed another organism. But they instead of noting down the characteristics, photographed the organism. Answer the following questions based on the above situation: (𝒊) Which desired values are reflected in the approach used by Group A but ignored by Group B? (𝒊𝒊) In what way is the observation by Group B different from Group A? (𝒊𝒊𝒊) Which group would you like to be in and why?

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