Q.

Bilaterally symmetrical and acoelomate animals are exemplified by                       [2020]

1 Ctenophora  
2 Platyhelminthes  
3 Aschelminthes  
4 Annelida  

Ans.

(2)

Platyhelminthes are bilaterally symmetrical, triploblastic, and acoelomate animals with an organ level of organization.