Question

The following is a list of inter vertebrate categorise them into different phyla by giving one characteristic feature to justify your classification starfish, Octopus, planaria, Nereid,sycon

Answer 1

Invertebrates and it's Phylum

Starfish - Echinodermata

Octopus - Mollusca

Planaria - Platyhelminthes

Nereid - Annelida

Sycon - Porifera

Charactristics of Invertebrates

Starfish :- They are marine invertebrates.

They typically have a central disc and five arms,


Octopus :- Many species of octopus change color. Using pigment sacs they can change color to express different emotions, deter predators or attract prey

Planaria :- They are common to many parts of the world, living in both saltwater and freshwaterponds and rivers. Some species are terrestrial and are found under logs, in or on the soil, and on plants in humid areas.


Nereididae :- The prostomium of Nereididae bears a pair of palps that are differentiated into two units, the proximal unit is much larger than the distal unit.

Sycon :- Body wall consists of outer dermal epithelium, called pinacoderm and inner flagellated epithelium, called choanoderm.​​​​​​​