Question

11. Closed type of circulatory system is present in
1) Annelids
2) Many molluscs
3) Lower chordates4) Arthropods​

Answer 1

Answer:

lower chordates

Explanation:

because

annelids,molluscs don't have proper and fully developed circulatory system..annelids in the sense earthworms in where the origin of circulation started with cardiac muscle similar to heart but it have open circulation and arthropods like cockroaches contain open type of circulation from head to bottom with 13* chambered heart so it's open type and the only one left after elimination is lower chordates so it aybe the answer..

hope it helps..