Productivity

In terms of biology, productivity can be defined as the rate of production of amount of organic matter (food) which is accumulated in the living components of the ecosystem in unit area and time. We c…

Animal Behaviour

On the earth, almost all living organisms exhibit their specific type of behaviour in response to environmental conditon or external stimuli. Hence, behaviour may be defined as the expression of livin…

Cilia and Flagella

Cilia and flagella are one of the most important parts of the cell. They are fine, hair-like protoplasmic processes of the cells which are similar to each other in structure. They are present in some …

Centrioles

Centrioles are non-membranous organelles which are present in the cytoplasm near the nucleus of the cell. They are present in all animal cells and in flagellated motile cells of lower plants. They hav…

Nature of Viruses

We already know that viruses are one of the amazing organisms which have different interesting, unbelievable and unique traits or characteristics. Characteristics of Viruses Viruses are minute and sim…

Introduction to Virus

The term ‘virus’ is derived from the Latin language meaning poison. Green (1935 A.D.) says, viruses are the smallest units showing the reproductive property considered typical of life. The…