Biology · STRUCTURAL ORGANISATION IN ANIMALS

Review the anatomical features of Rana tigrina: (i) Circulation type, (ii) Nature of RBCs, and (iii) Tongue morphology. Which option correctly details all three?

1. A
   (i) Incomplete open system, (ii) Erythrocytes devoid of pigment, (iii) Non-muscular tongue.
2. B
   (i) Open vascular system with hemocoel, (ii) Enucleated erythrocytes, (iii) Unilobed fixed tongue.
3. C
   (i) Closed vascular system, (ii) Enucleated erythrocytes, (iii) Bifid tongue attached posteriorly.
4. D
   (i) Closed vascular system, (ii) Nucleated erythrocytes with haemoglobin, (iii) Bilobed tongue attached at anterior end.