In this article we will discuss about Protozoa:- 1. Habitat of Protozoa 2. Architecture of Protozoa 3. Organelles. Habitat of Protozoa: Adaptation of Protozoa is extended to all environments open to microorganism. Free-living forms occur in fresh water lakes, ponds, open ocean, river and even in temporary pools. Soil and sands also form natural environment for many Protozoa. Such Protozoa [...]
In this article we will discuss about Sponges:- 1. Taxonomic Retrospect of Sponges 2. Definition and Origin of Sponges 3. General Features 4. Habitat 5. Structural Peculiarities 6. Development 7. Affinities 8. Regeneration 9. Phylogeny. Contents: Taxonomic Retrospect of Sponges Definition and Origin of Sponges General Features of Sponges Habitat of Sponges Structural Peculiarities of Sponges Development of Sponges Affinities [...]
The following points highlight the two main skeletal elements found in sponges. The types are: 1. Spongin 2. Spicules. Skeletal Element: Type # 1. Spongin: The spongin comprises of fibres of spongin and they resemble silk in appearance. These are proteinaceous secretion of the spongioblasts and form a network. In most cases, the spongin fibres are composed of protein, termed [...]