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Natural selection can therefore mean differential reproduction among members of the sarne gene pool. We earlier said that selection would promote those alleles that give rise to phenotypes that are better adapted to a given environment. In other words, the frequencies of 'such alleles would tend to increase and those of ill-adapted ones would tend to decrease. What we are sayingis that natural selection is a matter of changes in gene frequencies. Differential reproduction has a dual role to perform. One it leads to or maintains adaptations and therefore determines whether individuals of a population or species will survive; and two, it is a process which determines what changes will occur in the frequencies of alleles in a gene pool of sexually reproducing individuals.
Anterior superior alveolar nerve It is a branch of infraorbital nerve which arises within the infraorbital canal. It gives a nasal branch which passes into nasal cavity to supp
What is Translocation? Sometimes pieces of two chromosomes that are not homologous break off at the same time. If the broken pieces are re-attached to the opposite (in this cas
STRUCTUR E - B R A I N
Explain the Voges Proskauer (VP) Test? As it has been discussed in previous exercise, second group of enteric bacteria produces acid during early incubation which rapidly conve
Developmental Concepts Unique to Infants and Young Children The cognitive and social emotional development of infants and very young children has unique features. This age rang
Definition of Nursing Process According to WHO (2977) the "nursing process" is a term applied to a system of characteristic nursing interventions in the health of indivi
Gill slits are the opening or the clefts between the gill arches in the fish. Water taken in by the mouth passes through the gill slits and bathes the gills. It also has rudimenta
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The Term "Green House" effect was first introduced by j. Fourier in 1827. The green house effects are the rise in temperature of earth because certain gases in the atmosphere (CO2,
Define the Sun and Solar Drying Method? The make use of solar energy to preserve the food items is mainly the oldest form of food reservation and is still practiced today for f
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