A.Molluscs only
B.Annelids only
C.Arthropods only
D.Molluscs and echinoderms
Related Mcqs:
- Ventral nerve cord is absent in which of these:
- Which of these animals lacks a ventral nerve cord:
- Peripatus is a connecting link between:
- Which of these animals has a ventral nerve cord:
- Double ventral nerve cord is found in:
- Archaeocytes and interstitial cells are found respectively in:
- A cavity outside body called mantle cavity is found in:
- Anaerbic respiration occurs in:
- Excretory organs are totally absent in:
- Water vascular system is present in:
