Basis of Classification
Basis of Classification: Overview
This Topic covers sub-topics such as Notochord, Body Cavity, Bilateral Symmetry, Radial Symmetry, Germ Layers, Acoelomates, Pseudocoelomates, Coelomates, Cellular Level of Organisation, Tissue Level of Organisation and, Schizocoelomates
Important Questions on Basis of Classification
In vertebrates, skin is developed from the germ layer called mesoderm.
Which of the following organism possesses enterocoelom?
Name the type of coelom occurs in the phylum Chordata, whether it is enterocoelom or schizocoelom?
Starfish possesses schizocoelom.
Arthropodes are schizocoelomates.
Which of the following organism are called schizocoelomates?
Which animals lack the organ system level of organisation?
Which among the four levels of organisation in animals is the highest?
What do you understand by an incomplete digestive system?
Animalia phylum that has a cellular level of organisation.
Sponges show which type of symmetry?
What do you mean by asymmetric symmetry?
Match the names of phyla listed under column I with the body cavity given under column II; choose the answer which gives the correct combination of the two columns.
| Column I | Column II |
| A. Platyhelminthes | 1. Enterocoel |
| B. Nematoda | 2. No body cavity |
| C. Annelida | 3. Pseudocoel |
| D. Echinodermata | 4. Schizocoel |
Which one of the following statements is incorrect?
Schizocoel is an annelidan character.
A radially symmetrical diploblastic animal is Ascaris.
Most important criteria used for the present day classification of living organisms is based on
