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 can classify productivity in two…
Oparin and Haldane Theory
Evolution is one of the aspects which are full of mysteries. No one has been successful to prove the method of evolution of living organisms. Till date, there are only many hypothesis related to evolution. Among such hypothesis, Oparin and…
Introduction to Pesticides
These days, agriculture has become very advanced. Due to the use of different techniques and tools, farmers are being able to produce more amounts of crops day by day. By using pesticides, the farmers are being able to kill all…
Land Pollution: Degradation In The Quality Of Land
Land pollution can be defined as the contamination of land. It is also known as soil pollution. It is basically about contaminating the land surface of the earth by the dumping of urban waste materials indiscriminately, dumping of industrial waste,…
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 living organisms or activities shown in response to the stimuli…
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 motile cells. Both of them…
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 have ability to replicate and occur in pairs…
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 simplest of all known organisms. They can only be seen with an…
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 most accepted definition is the one which was proposed by Bawden…
Principles of Classification of Organisms
The term ‘taxonomy’ was introduced by De Candolle in the year 1813 A.D. through his “Theorie Elementarie de la Botanique”. Taxonomy can be defined as a functional science which is guided by principles that have developed with the increase in…
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