1. Tardigrade
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  4. Tube-within-tube body plan is found in which animal?

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Q. Tube-within-tube body plan is found in which animal?

Animal Kingdom

Solution:

Euspongia, Fasciola and Hydra belongs to phylum-Porifera, Platyhelminthes and Coelenterata, respectively. These do not contain the tube-within-tube body plan.
Tube-within-tube is a body plan in which digestive canal is present inside the body cavity have appears tube with in a tube. All animals from the phylum-Aschelminthes to Chordata have tube-within-tube body plan and may be either protostomous or deuterostomous.