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In that Unit you also learnt about Darwin, who based on his extensive observations and interpretations showed that evolution is a simple fact of nature. It was Theodosius Dobzhansky, a population geneticist and one of the trinity to structure the modern synthetic theory of Evolution, who emphatically stated, "Nothing in Biology makes sense, except in the light of evolution". Today the Darwinian concept of evolution through natural selection has stood the test of time. As Julian Huxley rightly pointed out "Darwin rendered evolution inescapable a,s a fact, comprehensible as a process and all embracing as a concept". In Unit 10 of this Block you were cited several examples from studies on palaeontology , biogeography, anatomy, embryology, physiology and biochemistry as evidence in support of the evolutionary process. In this Unit we will more specifically discuss the mechanism of evolutionary change. We will elaborate on the Darwinian concept and look into its basic tenets. There will be a detailed discussion on the sources of variability, since variability is the raw material on which natural selection acts to produce adaptations. We will also explain the concept of Darwinian fitness and relate it to the reproductive success of organisms. Finally you will also become familiar with the different ways in which selection can act. In other words, this Unit will highlight that natural selection promotes structural, functional and ecological adaptations of individuals, populations and species to their existing environments.
Heparinisation Blood when allowed to flow out from body to the circuit tubings can get clotted. To prevent this, heparinisation is done. Patient is administered 3 mg
HISTORY ON CLASSIFICATION IN BIOLOGY
When the chromosomes are depleted of histones they are seem to have a central fibrous 'protein scaffold' or nuclear matrix to which the DNA is attached in loops. Therefo
The non-oxidative phase generates ribose precursors The non-oxidative phase of the pathway, including the following reactions, converts pentose-5-phosphate to other sugars.
Anthrax Synonym : Wool sorter’s disease Species affected : Cattle, sheep, goats, pig, horse and majority of the mammals. Fowls are resistant to anthr
Explain the Cardiovascular Effects? You must have heard of the 'French Paradox'. The lower incidence of heart attacks in certain areas of France despite higher prevalence of fa
Subtropical rain forests - Ecosystem In regions of fairly high rainfall but less temperature differences between winter and summer and broad-leaved evergreen subtropical biome
An A=T mispairing leads to an A=C substitution. The other DNA helix will contain a(n) __ pair. a. A=C b. A=T c. G=C d. B=Q e. T=T Can you also explain it please so if I'm ask
Non living vs. Living matter As is clear from above account the energy of matter resides in its chemical organization. The total potential chemical energy, entrapped as b
Which of the following is true for the sodium-glucose co-transporter? A. The net flux of sodium ions is from a region of high sodium ion concentration to a region of low sodium
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