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Question

Peripatus is a connecting link between?


A

Ctenophores and Platyhelminthes

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B

Coelenterata and Porifera

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C

Annelida and Arthropoda

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D

Mollusca and Echinodermata

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Solution

The correct option is C

Annelida and Arthropoda


The correct option is C.

Explanation of the correct answer:

  1. Peripatus is a living fossil.
  2. Its jointed legs, appendages, compound eyes, and tracheas show their link to the Arthropoda.
  3. Its segmented body, nephridia, and non-chitinous outer layer show their link with Annelida.

Explanation of the incorrect options:

Option A:

  1. Peripatus shows no commonality with Ctenophores and Platyhelminthes.
  2. Ctenophores and Platyhelminthes are diploblastic with unsegmented bodies.
  3. Ctenophores have cilia for locomotion and Platyhelminths have dorsoventrally flattened bodies.

Option B:

  1. Peripatus shows no commonality with Coelenterata and Porifera.
  2. Neither have the organ system level of organization.
  3. They are diploblastic with unsegmented bodies.

Option D:

  1. Peripatus shows no commonality with Mollusca and Echinodermata
  2. Both have unsegmented bodies.
  3. Mollusca are soft-bodied with calcareous shells and Echinodermata have endoskeletons made of calcareous ossicles.

Final answer: Peripatus is a connecting link between Annelida and Arthropoda.


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