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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.
Depth and Currents Depth The sea is very deep varying in different regions. Generally life extends to all depths but is confined more to the continental shelf and
Nonsurgical retreatment will be the preferred choice -Less invasive .. not cause problem to the pt. -Less traumatic postoperative .. most probably no post operative pain
Non-Conventional Feed Resources There are many non-traditional or non-conventional materials which are available in abundance and can form potential source of feedstuffs for f
In E. coli there are seven rRNA transcription units scattered by the genome, each of that contains one copy of every of the 16S, 23S and 5S rRNA genes and one to four c
Explain assessment of iron status - Serum Ferritin? Serum Ferritin: This method is indicative of iron stores. As we know, a long term negative iron balance first results in dep
what are the origin, morphology, active constituents, uses and market preparation of tanco beans
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Colluvial These are the soils formed from the material transported by the pull of gravity. Fragments from cliffs or steep rocky slopes become dislodged from time to time and ma
Shows evidence of the ability to see the interaction between environment / ecology and genetics / evolution Some candidates may recognise that evolution can result in less no
Which one of the following statements about human sperm is correct? 1. Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilis
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