Question

Organ system level of organization is found in animal phyla

a) Higher than aschelminthes b) Higher than platyhelminthes

c) Higher than annelida d) Between porifera and chordata

e) Between platyhelminthes and echinoderm​

Answer 1

Answer:

between platyhelminthes and echinoderm

Answer 2

Answer:

b) option.

Explanation:

these animals exhibit tissue levels of organisation and are classified as coelentre .Phylum Platyhelminthes and ascheliminties have an organ level of organisation. Non-chordate such as Annelids, arthropods, molluscus echinoderms and choradates have a specialised organ system for their physiological activities