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The effect of natural selection on colonies or population favouring one group in preference to other may be referred to as group selection. A group can be the smallest collection of individuals within a population or a colony. Group selection, it must be understood, is distinct from selection among individuals. The fitness of the genotypes between groups may vary within a population. The concept of altruism can be extended to groups as well. A colony consisting of many altruists has better chances of survival than a colony consisting of selfish individuals. Let us take hypothetical situatioii where individuals of a colony, reproduce indiscriminately having no regard for the carrying capacity of the environment. On the other hand, consider a colony of individuals with genes restricting population growth, utilising optimally the food sources of the environment. The selection would essentially favour the latter group and the former may eventually face extinction.
Hydrolyases These enzymes (code EC 3) catalyze the hydrolytic cleavage of C-O, C-N, C-C and some other bonds, including phosphoric anhydride bonds. Their trivial names are f
Which gas in each of the following pairs would you expect to be more soluble in water? Why? (a) Oxygen and Carbon Dioxide (b) Nitrogen and Ammonia (c) Methane and Hydrogen Sulfide.
Byproducts of low digestibility and low nitrogen Straws, husks, pods and haulms are the byproducts of this category. Very often the nitrogen content in these byproducts is so l
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Q. Causes of oesophagitis? The causes include tissue erosion by hydrocliloric acid (EIC1) and pepsin, with symptoms of substernal burning, cramping, pressure sensation or sever
what are the origin, morphology, active constituents, uses and market preparation of tanco beans ?
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What is bicuspid aortic? Bicuspid aortic valve is the most common form of CHD seen in adults. Isolated bicuspid aortic valves may be stenotic or non-stenotic to start with. T
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