In animals like Annelids, Molluscs, organs have associated to form functional systems, each system concerned with a specific physiological function. ThisÂ pattern is called ________ system level of organization.

In animals like Annelids, Molluscs, organs have associated to form fun

1.	In animals like Annelids, Molluscs, organs have associated to form functional systems, each system concerned with a specific physiological function. ThisÂ pattern is called ________ system level of organization.
A.	organ
B.	open
C.	closed
D.	coelom
Answer» B. open