In this article we will discuss about the structure and life history of elphidium, explained with the help of suitable diagrams. Structure of Elphidium: 1. The shape of the animal is more or less round. 2. It is surrounded with a many-chambered, mullilocular and perforate calcareous shell consisting of 45 to 50 chambers. 3. The, chambers are boat-shaped and spirally [...]
In this article we will discuss about:- 1. Genus of Euglena 2. Structure of Euglena 3. Locomotion 4. Nutrition 5. Reproduction. Genus of Euglena: The Euglena is an acellular, fresh water organism placed in the order Euglenida, class Phytomastigophora, subphylum Mastigophora, phylum Sarcomastigophora, subkingdom Protozoa. The genus Euglena comprises probably about fifty species and they vary considerably in shape, size [...]
In this article we will discuss about the subdivisions of the kingdom animalia. Subkingdom Protozoa: Small, unicellular (acellular); (Fig. 17.2) free-living or parasitic; terrestrial, fresh water, marine; locomotory organelles pseudopodia, flagella, cilia; reproduction both asexual and sexual. Phylum Sarcomastigophora: Locomotory organelles flagella, pseudopodia; nucleus single type; sexuality essentially syngamy. Phylum Labrynthomorpha: Marine or estuarine; trophozoite stage; cytoplasmic network with spindle-shaped [...]