Question

Three sailent feature of invertebrate

Answer 1

Answer:

they do not have a back pain. there are multicellular. all the cells have different responsibility.in keeping the animal alive the have no cell walls

Answer 2

Answer:

1). They do not have a backbone.

2). They are multicellular. ...

3). They have no cell walls, like all other animals.

4). They reproduce by two reproductive cells, or gametes, coming together to produce a new organism of their species.