Home › CBSE Class 11 › biology › Animal Kingdom — Basis of Classification + Major Phyla (Porifera through Chordata) › Phylum Aschelminthes is characterised by:
Phylum Aschelminthes is characterised by:
ADiploblastic, radially symmetrical
BCoelomate, segmented
CPseudocoelomate, bilaterally symmetrical, triploblastic, round in cross-section (roundworms); examples — Ascaris, Wuchereria, Ancylostoma
DAcoelomate, triploblastic, dorso-ventrally flattened
Answer & Solution
Correct answer: C. Pseudocoelomate, bilaterally symmetrical, triploblastic, round in cross-section (roundworms); examples — Ascaris, Wuchereria, Ancylostoma
Aschelminthes (Nematoda) are pseudocoelomates — body cavity present but NOT lined by continuous mesoderm. Round in cross-section. Sexes separate; females typically larger. Examples: Ascaris (roundworm), Wuchereria (filaria), Ancylostoma (hookworm).
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