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In which one of the following is the genus name, its two characters and its phylum NOT correctly matched?

  1. A
    Periplaneta: (a) Jointed appendages (b) Chitinous exoskeleton — Arthropoda
  2. B
    Pila: (a) Body segmented (b) Mouth with radula — Mollusca
  3. C
    Asterias: (a) Spiny skinned (b) Water vascular system — Echinodermata
  4. D
    Sycon: (a) Pore bearing (b) Canal system — Porifera

Solution & Step-by-step Explanation

Pila (Apple snail) belongs to the phylum Mollusca. Molluscs are typically unsegmented (except Neopilina). Therefore, "Body segmented" is an incorrect character for Pila. Other options are correct.

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In which one of the following is the genus name, its two characters and its phylum NOT correctly matched?
A
Periplaneta: (a) Jointed appendages (b) Chitinous exoskeleton — Arthropoda
B
Pila: (a) Body segmented (b) Mouth with radula — Mollusca
C
Asterias: (a) Spiny skinned (b) Water vascular system — Echinodermata
D
Sycon: (a) Pore bearing (b) Canal system — Porifera

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