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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.
Ovule The ovule, also known as the megasporangium is the forerunner of the seed. It consists of a central mound of tissue called the nucellus, which is enveloped by one or tw
Effects on Ecosystem - Air pollutants The effects of pollutants on ecosystem become visible after a long period of exposure. In highly industrialised countries the vegetation
TYPES OF CELL WALL Cell wall differentiated into the following layers : 1. Primary Cell Wall 2. Secondary Cell wall 3. Tertiary Cell wall 1 .
Why is the dietary obtainment of iodine so important for thyroid functioning? The obtainment of iodine from the diet is significant for the thyroid because this chemical elemen
Vitamin- D deficiency Animals obtain vitamin D either through the diet or when skin is exposed to solar radiation. The deficiency of vitamin D is associated with reduced absor
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Artificial Skin: The skin generated in vitro is in fact the epidermis portion of skin only; when the epidermis is applied to the burnt part, this leads to the regeneration of d
#question.WRITE THE CHARACTER AND CLASSIFICATION OF MOLLUSCA ?
Explain mixture in basic chemistry? Mixtures : Mixtures are produced by combining two or more substances. In contrast to the substances in compounds, the substances that com
Q. Explain Reproducibility of Venricular Ectopy ? Experimentally it has been shown that PVCs are frequently seen at the inception of acute ischaemia. Thus, exercise induced PVC
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