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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.
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Q. Clinical Symptoms of diabetes mellitus? In mild cases of diabetes mellitus, no symptoms may be seen. The diagnosis could be incidental during a blood or urine investigation.
Methods Useful in Self-Incompatibility More specific methods useful in overcoming self-incompatibility are mentioned below 1. Bud Pollination : In Petunia axillaris early
Which type of genetic disease can be identified from the visual analysis of the number of chromosomes present in a karyotype? The counting and the identification of chromosomes
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What is Gene therapy Gene therapy targets non germ line cells, ie somatic cells, so will not directly affect gene pool. The frequency of the allele for the genetic disease w
Open Type of Circulatory Systems Several non-chordates have thus an open type of circulation - a system in which blood pumped by the heart empties through an artery into an op
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Removal of obturating material -Gutta percha . -Carrier bassed gutta perca. -silver points . - paste type. - obstructed fracture instrument .
Explain Glycerol esters of fatty acids Glycerol esters of fatty acids, which make up to 99% of the lipids of plant and animal origin have been traditionally called fats and oi
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