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The cross-section of the body of an invertebrate is given below. Identify the animal which has this body plan.



  • a)
    Cockroach

  • b)
    Earthworm

  • c)
    Roundworm

  • d)
    Planaria

Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The cross-section of the body of an invertebrate is given below. Ident...
  • It has three-layered body wall which includes ectoderm, endoderm, and mesoderm. 
  • Acoelomates lack a body cavity, and instead the space between the body wall and the digestive tract is filled with muscle fibres and loose tissue called parenchyma.
  • It acts as a skeletal support, nutrient storage, motility, reserves of regenerative cells and transporting materials.
  • Planaria belongs to phylum Platyhelminthes.
  • These are flatworms and has acoelomate body plan.
Hence, the correct option is D.
NCERT Reference: Topic Phylum – Platyhelminthes” of chapter Animal Kingdom
 
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Most Upvoted Answer
The cross-section of the body of an invertebrate is given below. Ident...
Planaria belongs to phylum Platyhelminthes. These are flatworms and has acoelomate body plan. It has three-layered body wall which includes ectoderm, endoderm, and mesoderm. Acoelomates lack a body cavity, and instead the space between the body wall and the digestive tract is filled with muscle fibres and loose tissue called parenchyma. It acts as a skeletal support, nutrient storage, motility, reserves of regenerative cells and transporting materials.
So, the correct answer is option D
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Community Answer
The cross-section of the body of an invertebrate is given below. Ident...
This picture is Pseudoceolomate because patches of mesoderm is lined.. and Pseudoceolomate animal are aschehelmenthis so answer is roundworm.
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