Question

The diagram of Labea rohita is given above. Identify the parts labelled as A, B, C, D, E, F, G respectively.

• A. A- Stimulus, B - Receptor nerve, C - Sensory nerve, D - Motor, E - Effector nerve, F - Pectoral fin, G - Pelvic fin
• B. A - Nostril, B - Eye, C - Anal fin, D - Caudal fin, E - Dorsal fin, F - Pectoral fin, G - Pelvic fin
• C. A- Nostril, B - Eye, C - Dorsal fin, D- Caudal fin, E - Anal fin, F - Pelvic fin, G - Pectoral fin
• D. A - Nostril, B - Eye, C - Dorsal fin, D - Caudal fin, E - Pectoral fin, F - Anal fin, G - Pelvic fin

Answer 1

Answer: (C)

A- Nostril, B - Eye, C - Dorsal fin, D- Caudal fin, E - Anal fin, F - Pelvic fin, G - Pectoral fin

The head of the fish has its mouth, nostrils and gills cover called as operculum. A refers to the nostril and B is the eye of the fish. The fins are made up of stiff rays or scales covered by skin. It helps the fish to swim. The fish has many types of fins as dorsal, caudal and lateral fins. Dorsal fin is the fin at the side of the fish and it provides stability during swimming. Caudal fin is also called the tail fin and is present at the posterior end and is the main propelling fin. This fin helps in changing the direction of swimming. C represents the dorsal fin and D is the caudal fin. Anal fin is another type of fin which also lends stability in swimming. E refers to the anal fin. The pectoral fins helps in locomotion and side to side movement. G refers to pectoral fin.
Thus, the correct answer is option C.