Question
Name the division in which true jaws are absent. Write any four differences between Pisces and Tetrapoda super class.
✓
Answer
True jaws are absent in animals of Division Agnatha.
Difference between Pisces and Tetrapoda:
Difference between Pisces and Tetrapoda:
| Pisces | Tetrapoda |
| All of them are aquatic. | These are aquatic, terrestrial and aerial. |
| Median fin is present. | The median fin is absent. |
| Skin is generally moist and scaly. | The skin is generally dry and rough. |
| Sensory organs remain active in water. | Sensory organs remain active in air. |
| Respiration takes place through aquatic and gills. | Respiration takes place through aerial and lungs. |
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