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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.
Where can RNA be found within cells? In the eukaryote cell nucleus RNA can be found dispersed in the nuclear fluid, with DNA, and as the main constituent of the nucleolus. In c
Your client has the flu and reports 5-6 loose stools a day. He has experienced an isotonic fluid volume loss. Explain what an isotonic fluid loss means.
Descent of the Testis The testis develops on the posterior abdominal wall at the mesonephric ridge. To reach the adult position in the scrotum, it must decent. A fibrous cor
What differences would you expect to see among pea seedlings grown for 10 days in total darkness and pea seedlings grown in the light for the similar period of time? The s
Q. Can you explain Restrictive Ventricular Septal Defect ? VSD is restrictive when VSD pressure gradient is more than 60mmHg (systolic cuff pressure-VSD lpressure grad
Which Foods allowed in soft diet:- Soups - mildly flavoured - broths and cream soups. Beverages - all Meat - moist, tender meat, fish or chicken, cottage cheese, eggs
What is the relation among fecundation and the end of the meiotic process during oogenesis? The oocyte II only completes the second meiotic division (interrupted at metaphase) i
Larval forms - Porifera In the majority of sponges the larval stage develops in the body of the parent. The larva is generally at the blastula stage of development. Figure dis
Define the term - Sulphur Sulphur is found in small amounts in soil perhaps 0.15% only. A large part of sulphur used by plants comes from decomposing organic matter or from f
What are some mechanisms by which pathogenic bacteria cause diseases? Why is this knowledge important? Pathogenic bacteria have characteristics called as virulence factors that
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