In which one of the following the genus name, its two charcters and its phylum are not correctly matched, whereas the remaining three are correct

 

Genus name

  Two Characters

Phylum

 

  • Option 1)

     

       

        

    Pila

    (a)

    Body Semented

    Mollusca

    (b)

    Mouth with Radual

     

  • Option 2)

     

     

    Asterias

    (a)

    Spiny skinned

    Echinoermata

    (b)

    Water vascular system

     

  • Option 3)

     

     

    Sycon

    (a)

    Pore bearing

    Porifera

    (b)

    Canal system

     

  • Option 4)

     

     

    Periplaneta

    (a)

    Jointed appendages

    Arthropoda

    (b)

    Chitinous exoskeleton

     

 

Answers (1)

 

Body structure of Mollusca -

Body is covered by calcareous shell and is unsegmented with a distinct head, muscular foot and visceral hump. Mouth contains rasping organ called radula.

- wherein

A soft and spongy skin layer called mantle forms the skin. Mouth cavity is present between hump and mantle which contains feather like gills.

 

 

Molluscs are bilaterally symmetrical, triploblastic, coelomate, soft-bodied animals. Thier soft body is covered by a calcareous

shell and is


Option 1)

 

   

    

Pila

(a)

Body Semented

Mollusca

(b)

Mouth with Radual

 

This is correct option

Option 2)

 

 

Asterias

(a)

Spiny skinned

Echinoermata

(b)

Water vascular system

 

This is incorrect option

Option 3)

 

 

Sycon

(a)

Pore bearing

Porifera

(b)

Canal system

 

This is incorrect option

Option 4)

 

 

Periplaneta

(a)

Jointed appendages

Arthropoda

(b)

Chitinous exoskeleton

 

This is incorrect option

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