1. Tardigrade
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  3. Biology
  4. Sinus venosus is present in :

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Q. Sinus venosus is present in :

Delhi UMET/DPMTDelhi UMET/DPMT 2001

Solution:

Sinus venosus is present in fish, amphibians and reptiles.
It is an accessory chamber of heart.
Syrinx is responsible for the sound production.
It is present in birds only.
Archaeopteryx is considered to be a connecting link between reptiles and birds.
Four chambered heart is present in birds and mammals.