The following points highlight the two major types of habitat. The types are: 1. Aquatic Animals 2. Terrestrial Animals. Type # 1. Aquatic Animals: They live in water. Animals of sea water are called marine animals. Animals of rivers, streams, lakes, ponds and even drains are called fresh water animals. Animals which live in between salty and fresh water are [...]
The following points highlight the three types of symmetry in animals. The types are: 1. Spherical Symmetry 2. Radial Symmetry 3. Bilateral Symmetry. Type # 1. Spherical Symmetry: In this type of symmetry, the body of the individual can be divided into similar halves by any plane passing through the centre, e.g. Volvox, some sponges and some corals. Type # [...]
The following points highlight the two types of germinal layers of the animals. The types are: 1. Segmentation 2. Development. Germinal Layers: Type # 1. Segmentation: Segmentation is division or differentiation of the body into distinct portions called segments. It is of two types: metameric segmentation and pseudo-metamerism. I. Metameric Segmentation (True metamerism or True segmentation): It is a type [...]