In biology, earthworm is also known as Pheretima. It is one of the organisms which can be found in most of the parts of the world. It lives in soil which is rich in decaying organic matters. Some examples of…
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,…
Homologous Series
Homologous series is the series of organic compounds containing same functional group and their adjacent members differ by -CH2 group. The members of homologous series have similar chemical properties but different physical properties. For example: CH3-OH CH3-CH2-OH CH3-CH2-CH2-OH CH3-CH2-CH2-CH2-OH Characteristics…
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…
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…
Golgi Bodies
Golgi bodies are one of the important parts of a cell. They were first discovered or identified by Italian cytologist Camillo Golgi in the year 1898 A.D. He found them in the nerve cells of the barn owl and cat.…
Units and Quantities
Units Measurement is the comparison of an unknown quantity with a known quantity of same kind. For the measurement of any substance, we require a standard quantity called unit. Units can be defined as the standard quantities with which we…
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