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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.
Chromophore - Development of plant The chromophore is a tetrapyrrole molecule like chlorophyll, but unlike chlorophyll it is an open tetrapyrrole and contains no metal ion. It
Q. How is respiration performed by the larva of amphibians? The larva of amphibians has exclusively branchial respiration this is one of the reasons why it depends on water to
What is the explanation for the bleeding that accompanies menses? The hemorrhage that accompanies menses happens because the endometrium is a richly vascularized tissue. The r
What are the four groups of protozoans? The four major groups of protozoans are the sarcodines (that form pseudopods, like amoebae), the mastigophores (flagellated, such as the
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Q. What are some symptoms and signs found in patients with hyperthyroidism? The hormones made by the thyroid gland stimulate the basal metabolism of the body in hyperthyroidism
what is test cross?
DISACCHARIDES They are oligosaccharides composed of two monosaccharide residues . Three common disaccharides are sucrose (glucose + fructose) = cane suger maltose
Intergenic: Amongs the two genes; for example intergenic DNA is the DNA found amongs two genes. The term is frequently used to mean non-functional DNA (or at least DNA with no kno
Types of Cambium On the basis of the arrangement of the Fusiform cells as seen in tangential section, cambium is divided into: A) Storied/Stratified Cambium : The groups o
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