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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.
Hydrocolloids are extremely versatile and are used for many other purposes including: (a) Production of pseudoplasticity (i.e. fluidity under shear) at high temperatures to ea
Duck virus hepatitis This highly contagious disease of ducks is caused by a member virus belonging to genus Enterovirus of the family Picornaviridae. It mostly affects duckling
From which germ layer do the epidermis and the nervous system originate? What are other organs and tissues made from that germ layer? Epidermis and nervous system have the simi
feature
COMMON DISEASE OF PIG - 1 . FOOT AND MOUTH DISEASES 2 . ANTHRAX 3 . TUBERCLOSIS 4 . SWINE FEVER - Charactrized by high fever, d
What Devices Used for Oxygen Therapy? Variable performance systems: With these devices, the FiO 2 would vary depending on the patient's breathing pattern. In general, rapid, s
What are phospholipids? Phospholipids are molecules made of glycerol bound to two long molecules of fatty acids and to one phosphate group. Thus, phospholipids are amphipathic
What is xaxim? Most pteridophytes have subterraneous stems parallel to the substrate known as rhizomes. Xaxim is a type of pteridophyte with an aerial stem generally perpendicu
GERENAL CHARACTERICS OF PHYLUM ANNELIDA
#questwhy and where endomitosis happens?ion..
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