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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.
In detail , how does the body maintains the blood calcium ion homeostasis ( including the description of negative feedback system, organs and hormones involved) What is osteoporosi
Aplastic Anaemia Aplastic anaemia is a condition in which production of red cells in the bone marrow is reduced. It involves failure to produce adequate red cells, white cell
Define methods of Food Preservation? Food preservation is one of the oldest technologies used by human beings. The perishable food materials like fruits, vegetables, milk, meat
Style of Stigma Interaction The style has been distinguished into two types: In open styles a stylar canal is present which is lined with a well-developed glandul
Effects of long term malnutrition The effects of long term malnutrition are more severe in children. Children do not have sufficient amounts of carbohydrates and fats in
Explain the Altered Glucose Metabolism - Metabolic Response to Injury? Following injury, hypoglycemia commonly occurs and is related to the severity of the stress. In the ebb p
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Soy Protein Concentrates The Association of American Feed Control Officials, Inc. (AAFCO) specifies soy protein concentrates as follows: "Soy Protein Concentrate is organiz
expanciate the process of oxygen and carbon dioxide exchange in sponges
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