Select the correct difference between nonchordates and chordates.
Nonchordates | Chordates | |
1. | Ventral nerve cord | Dorsal nerve cord |
2. | Tail is post-anal | Tail is pre-anal |
3. | Heart is myogenic | Heart is neurogenic |
4. | Heart is dorsal | Heart is ventral |
The heart of chordates is ventral to the gut. In nonchordates, the heart (if present) is dorsal to the gut. The heart of most nonchordates is neurogenic, while that of chordates is myogenic.