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 Protozoa:- 1. Nutrition in Protozoa 2. Respiration in Protozoa 3. Excretion 4. Reproduction. Nutrition in Protozoa: Nutrition is a process by which the individuals obtain nourishment. It includes ingestion, digestion, absorption and digestion. The nutrition of protozoa is manifested by following ways (Fig. 10.68): A. Holozoic or Zootrophic or Heterotrophic nutrition, B. Holotrophic [...]
The following points highlight the three main classes of Phylum Porifera. The three classes are: 1. Calcarea or Calcispongiae— (Calcareous Sponges) 2. Hexactinellida or Triaxonida or Hyalospongiae—(Glass Sponge) 3. Demospongiae. Phylum Porifera: Class # 1. Calcarea or Calcispongiae— (Calcareous Sponges): [Calcarea, L. Calcarious = limy, Calcispongiae, L. Calcis = genitive of calx = lime or chalk] Features: (i) Exclusively marine, [...]