Solution:
Pheretima (Annelida) exhibits organ system of organisation.
Spongilla (Porifera) exhibits cellular level of organisation.
Meandrina (Cnidaria) and Ctenoplana (Ctenophora) exhibit tissue level of organisation.
Which of the following exhibits the highest level of organisation?
Pheretima (Annelida) exhibits organ system of organisation.
Spongilla (Porifera) exhibits cellular level of organisation.
Meandrina (Cnidaria) and Ctenoplana (Ctenophora) exhibit tissue level of organisation.