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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.
Circuitry and Priming : The cardio pulmonary bypass circuit consists of oxygenator, tubings, cannulae, cardiotomy reservoirs and cardioplegia attachments. The first step is to pri
Define Control of infections for treatment for pem? Appropriate antibiotics should be started immediately since infections are the immediate cause of death in many children. Ch
What is a nutrient? A nutrient is it substance used in the metabolism and which is acquired from the diet. Such as, vitamins and necessary amino acids are nutrients.
Q. Can you explain Salmonellosis Salmonellosis is a common food bome disease all over the world. There are approximately 1600 different strains (sero types) of Salmonell
Q. Why are the salt and sugar used in the production of dried fruits and dried meat? Substances that sustain a highly hypertonic environment, like salt and sugar, are used in t
How are the plant tissues classified according to their functions? Plant tissues are separated into growth (embryonic) tissues, supporting, filling and photosynthetic tissues (
Explain about the Toxicity of pyridoxine? Though toxicity related to pyridoxine intake are rare, but use of high doses of pyridoxine for the treatment of pre-menstrual syndrom
Explain biological aspects of nutrition Traditionally nutritionists have focused largely (or almost fully) on . However, we have realized over the years, that physiological bio
ENDOPLASMIC RETICULUM It is also known as Endoskeleton of the cell, Endomembranous system of the cell. Garnier (1897) first observed them and called Ergastoplasm. E.R.
Explain about the Derived Proteins? These are not naturally taking place proteins and are obtained from simple proteins by the action of enzymes and chemical agents, heat, mech
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