primitive and non primitive unit cells

Phylum Protozoa (Primitive Animals)..

Features of Protozoans - Amoeba is a typical protozoa..

There are three types of non-primitive unit cells. Taking the example of a cubic unit cell we can see that there are three types. They are: fig 2.2 - Types of unit cells..

Non-Membranous Cell Organelles - Following are the cell organelles that are not bound by the unit membra..

Prokaryotic and Eukaryotic Cells - There are two basic types of cells found in living organisms - the prokaryotic cells and the eukaryotic cells. This classification is based on three main features, namely; Organisation of biomembranes Nature of cytoplasmic o..

The cell wall is present only in plant cells. It is made up of a complex polysaccharide (carbohydrate) called cellulose. Its function is to give strength and rigidity to the cell. It is non-living...

The coacervates were in a state of dynamic equilibrium, constantly taking in new materials from the oceans and releasing degraded materials. Thus, they had all the basic properties of life such as metabolism, growth and reproduction. However, they lacked the complexity of molecular organization, ca..

>Plastids are spherical or oval cell organelles found only in plant cells. Plastids are of two types: leukoplasts without any colouring pigments and chromoplasts containing colouring pigments. The most familiar chromoplasts are the chloroplasts containing chlorophyll. Lysosomes ..

Chemical evolution resulted in the formation of life on earth about 3.8 billion years ago. The primitive cells that resulted from this process gradually gave rise to primitive forms of organisms such as bacteria, algae, fungi and protozoan. These organisms in tur..

Amoeba is a typical protozoan...