main idea

One of the main ideas in the modified cell principle is that new cells arise from pre-existing cells (Omnis cellula e cellula). Every new cell formed must inherit not only the nucleus which contains the genetic information, but also should inherit the cell organelles that are re..

The occurrence of evolution is undeniably established by the various types of evidences that are available today. However, how it has come about is explained by the several ideas that have been put forth from time to time. These ideas are known as 'theories on organic evolution'..

One of the main ideas in the modified cell principle is that new cells arise from pre-existing cells (Omnis cellula e cellula). Every new cell formed must inherit not only the nucleus which contains the genetic information, but also should inherit the cell organelles that ..

It is the name given to the theory proposed by Jean Baptiste Lamarck (1744-1829), the French Zoologist. It is also known as the 'theory of inheritance of acquired characters'. fig. 5.3 - Jean Baptiste Lamarck Lamarck has explained his ideas on organic evolution in the book Philosophi..

Theories on Organic Evolution - The occurrence of evolution is undeniably established by the various types of evidences that are available today. However, how it has come about is explained by the several ideas that have been put forth from time to time. These ideas are known as..

The natural systems of classification of angiosperms have mainly used the floral characteristics as the basis. Some of the earlier attempts in this direction were those of Linnaeus, John Ray, Bentham and Hooker. However, these systems of classification are now termed as non-phylogenetic n..

Question: You see this inspiring picture of enthusiastic cyclists who 'Breeze Through Life' on the third Sunday of each month. This has a deep impact on you. You give a speech in the morning assembly on 'The Benefits of Cycling'. Write out this speech taking your own ideas and those..

Organic evolution refers to the slow and gradual process by which living organisms have changed from the simplest unicellular form to the most complex multi-cellular forms that are existing today. Organic evolution primarily involves modifications in the existing organisms and the inheritance ..

The measurement of dipole moment helps in distinguishing between polar and non-polar molecules. Non-polar molecules have zero dipole moment while polar molecules have some value of dipole moment. For example: Non-polar molecules: O 2 , Cl 2 , BF 3 , CH 4 Polar Molecules: HF (1.91 D), HCl (1.03 ..

Characteristics of Equilibrium Constant - Some main characteristics of equilibrium constant are described below: The value of the equilibrium constant of a reaction is the same, at constant 'T' and 'P'. However, if either temperature 'T' or pressure 'P' or both are changed, the value of t..