JAMB - Biology (2021 - No. 5)
Flatworms and roundworms are said to be invertebrates because?
they are small animals
they can live inside the vertebrates
some of them are unicellular
they have no backbones
Εξήγηση
- The most familiar invertebrates include the Protozoa, Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mollusca and Arthropoda.
- Invertebrates are animals that neither possess nor develop a vertebral column, derived from the notochord.