
The below diagram shows symmetry, which is also found in the following group of organisms.


Important Questions on Animal Kingdom
Match the following and choose correct combination.
Column I | Column II | ||
i) | Cellular grade level | a) | Pheretima |
ii) | Tissue grade level | b) | Schistosoma |
iii) | Organ level | c) | Obelia |
iv) | Organ system level | d) | Sycon |


Column-I | Column-II | ||
P | Mollusca | i | Pseudocoelom |
Q | Annelida | ii | Radula |
R | Nematoda | iii | Radial symmetry |
S | Echinodermata | iv | Segmentation |
Choose the CORRECT combination.

Match the following
List - I | List - II | ||
(a) | Asymmetry | (i) | Cnidaria |
(b) | Radial symmetry | (ii) | Platyhelminthes |
(c) | Bilateral symmetry and Enterocoelom | (iii) | Porifera |
(d) | Bilateral symmetry without body cavity | (iv) | Hemichordata |
The correct answer is

Which of the following phyla possess body cavity as shown in the diagram below?

Consider following features:
- Organ system level of organisation
- Bilateral symmetry
- True coelomates with segmentation of body.
Select the correct option of animal group which possess all the above characteristics:

In which of the following symmetry, the response to external stimulus is quicker and more precise?


Tissue grade of organisation originated from


Metamerism is characteristic of

The blind sac body plan is shown by

______ is the study of internal structures of an organism.

The grade of organization in sponges is


A bilaterally symmetrical animal can be divided into mirror images by

True segmentation (metameric) occurred for the first time in


True segmentation (metameric) occurred for the first time in

Body cavity is the cavity present between body wall and gut wall. In some animals the body cavity is not lined by mesoderm. Such animals are called

