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Lemur [1.5K]
3 years ago
7

Based on their body _________, flatworms and rotifers were not thought to be closely related. However, _________ showed that the

y are a _________ group.
Biology
1 answer:
Veseljchak [2.6K]3 years ago
7 0

Answer:

Based on their body <u>structure</u><u>,</u> flatworms and rotifers were not thought to be closely related. However, <u>bilateral symmetry and body texture</u><u> </u>showed that they are a <u>soft-bodied</u> group.

Explanation:

  • Flatworm belongs to phylum Platyhelminthes and Rotifera belongs to phylum Rotifera.
  • Their body structure may be different but both of them have a bilaterally symmetrical body.  
  • Both are aquatic animals.  
  • Flatworm is made up of ectoderm endoderm and mesoderm and has circular and longitudinal muscles. Rotifera is made up of skeletal and visceral muscles. So, they are soft-bodied animals.

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Explanation:

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