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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.
What is the karyotype found in Down syndrome? Down syndrome is the aneuploidy that is a numeric alteration of chromosomes within the cells compared to the normal number of chro
As bone looses width, height, volume, the attached gingiva gradually decreases and is prone to abrasions caused by the overlying prosthesis. In addition high muscle attachments and
Q. Illustrate Thallium Scintigraphy? It is often done with SPECT (single photon emission computed tomography) which further increases the sensitivity. However, a stress test w
List out the Different Preservation Techniques? The different preservation techniques commonly used today are given in the Table. Table: Methods of food preservation a)
Explain the working of Skeletal Muscle? Skeletal muscle is under voluntary control and is responsible for voluntary movements of body parts. Skeletal muscle is also called stri
How much Fluids should be taken for management of obesity? Liberal amounts of water and zero/low calorie fluids may be included in the diet. It may be helpful to have a glass o
STRUCTURE Mitochondria is a double unit membranous structure. It consists of outer & inner membranes. Outer membrane is smooth & made up of lipoproteins. It bears m
#what is the habitat of phylum protozoa
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Processes in Succession - Ecology Whether succession is primary or secondary, in terrestrial or aquatic ecosystems, the basic processes involved in succession are similar. The
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