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Hemochordata

Give scientif...

Question

Give scientific reasons.

Balanoglossus is connecting link between non-chordates & chordates.

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Solution

Balanoglossus is considered a connecting link between chordates and non chordates because it shows characteristics which are present in both the phyla. For example, Balanoglossus shows the presence of notochord and pharyngeal gill slits which is a characteristic feature of chordates. It also shows the presence of heart which is dorsal just like non chordates.

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a. Though tortoise lives on land as well as in water, it cannot be included in class- Amphibia.
b. Our body irritates if it comes in contact with jelly fish.
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B. Balanoglossus is connecting link between non-chordates and chordates.
C. In Urochordata, notochord is only present in the larval stage.
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