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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.
An enzyme isolated from a mutant bacterium grown at 20 degrees celsius works in a test tube at 20 degrees celsius but not at 37 degrees celsius( 37 degrees celsius is the temperatu
HIV (Human Immuno Deficiency Virus) Infection and AIDS (Acquired Immune Deficiency Syndrome)
Dracunculiasis (guineaworm infestation) Dracunculiasis, a disease of man, which has been known since antiquity, is caused by the nematode parasite Dracunculus medinesis. The p
a) Produce annotated diagrams that illustrate how nerve impulses travel i) along a neurone ii) across a synapse.
Initiation of Aseptic Cultures The nutrient medium (basal medium) used for plant tissue culture would promote luxuriant growth of micro-organisms such as bacteria and fungi. W
Determination of Erythrocyte Transketolase (ETK) Activity? The enzyme transketolase requires TPP for its activity, for the metabolism of pentose phosphate sugars as described u
Uses of Grafting Grafting helps to preserve and perpetuate varieties that cannot reproduce by vegetative method. Grafting changes less useful varieties to more desirable
explain five kingdoms?
diseases of the large intestine
Which two structures does the trachea lead to in the lungs?
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