Parasitism is an association or a situation in which two organisms of different taxonomic positions live together where one enjoys all sorts of benefits (like derivation of nourishment, reproduction etc. which are basic requirements for existence) at the expense of the other. The benefited organism is called the parasite and the organism harbouring the parasite is called the host. Hosts [...]
The following points highlight the seven main factors affected by parasites. The factors are: 1. Respiration 2. Photosynthesis 3. Nitrogen Metabolism 4. Translocation 5. Growth Substances 6. Responses to Environments 7. Host-Parasite Interaction. Factor # 1. Respiration: As a consequence of infection, the respiration increases many times in the host tissue. This increase may be due to parasite tissue as [...]
In this article we will discuss about:- 1. Subject-Matter of Paramecium 2. Reproduction and Mode of Action of Paramecium 3. Origin of Paramecium. Subject-Matter of Paramecium: Sonneborn in 1943 found that Paramecium aurelia strains could be classified into "Killer" and "Sensitive" types. The killer strain secreted a toxic substance "paramecin" in the growing medium and this toxin was responsible for [...]