Select the incorrect feature of mollusca from the given statements.

1. Terrestrial or aquatic animals having cellular system level of organization.


2. Radial symmetrical and acoelomate animals and possesses two germinal layers.


3. A file like rasping organ called radula is present.


4. Usually dioecious and viviparous animals.


5. Examples include Pila, Octopus, and Dentalium.

(i) Terrestrial or aquatic animals having organ system level of organization (ii) Bilateral symmetrical and coelomate animals and possesses three germinal layers. (iii) A file like rasping organ called radula is present. Radula is an anatomical structure that is used by molluscs for feeding, sometimes compared rather inaccurately to a tongue. (iv) Usually dioecious and oviparous animals. (v) Examples include Pila, Octopus, and Dentalium.