Theory of evolution by Natural Selection

Theory of evolution by Natural Selection

Hello viewers, Today we are going to talk about the evolution by natural selection by Charles Darwin, which is a very interesting and fascinating topic and there is so much to talk about.  We will start with the definition first and then go into the detailed explanation of the topic.  So let's get started... Definition of evolution: Organic evolution is a slow and gradual process of change through, which higher forms of living organisms are produced from the pre-existing lower forms by means of speciation. Origin of life There are several theories put forward to explain the probable way of origin of life.   Devine theory: It states that the first life was created by God as it could not be proved experimentally it is not universally accepted. The theory of cosmic origin: It states that the first life was brought from some where in outer cosmos.  Due to lack of experiment support this is also not accepted. Theory of biochemical origin: It states that the...
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Heredity Inheritance and Variation of Traits

Heredity Inheritance and Variation of Traits

Heredity Inheritance and Variation of Traits Hello viewers, Today we are going to discuss about another important chapter which is heredity inheritance and variations of traits in living organism.  So as we always do, we will start with the definition first and then we will go deeper in the details of it.  So let's get started..... Mendel’s work containing his discoveries was first published in the year 1866 in an ordinary journal, “Brunn Society on Natural Science” in the name “Experiment in plant hybridization”.  But his contribution remained unnoticed until 1900, when his laws were rediscovered by three European botanist – Hugo De Vries of Holland, Carl Correns of Germany, and Enrich Von Tschermak of Austria.   Heredity Inheritance and Variation It is the mode of transference of characters from the parents to the offsprings or from one generation to another.   Genetics:  The branch of science concerned with heredity. a. Heredity: The mechanism by which the physical, mental etc. characteristics of parents are transmitted from one generation to...
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