Which of the following statements correctly describes an adaptation central to the water-to-land transition made by animals?

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Arthropods have a permeable exoskeleton.

  

Insects can close their respiratory passages.

  

Molluscs evolved a hydrostatic skeleton.

  

Earthworms depend on a hydrostatic skeleton to move in soils.

 

asked Dec 29, 2012 in Biology by anonymous
    

1 Answer

0 votes

 

Insects can close their respiratory passages.

 

answered Dec 29, 2012 by anonymous



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