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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.
Heat Production In the Homeotherms heat production must be elevated if the ambient temperature falls below the critical temperature. Although all metabolic processes result i
Aeolian Wind transported materials constitute this category. This can be further divided into dunes or loess. Dunes are found in thr& types of situations. Fitly, these may occu
wath is sun
Explain the Stages of alzheimer's disease? Stage I - There is an increased forgetfulness, anxiety and depression. Associated nutrition related changes include difficulty in
note about water microbiology
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Pollen Stigma Interaction - Stigma The Stigma After landing on the stigma pollen grain germinates, and produces a pollen tube that carries the male gametes. The stigma has bee
a) What does secondary productivity in an ecosystem indicate? b) List any two factors by which productivity is limited in aquatic ecosystems
Define the effect of Vitamins (A, D, K and B-Complex) on athletes? Vitamins A, D and K have been found to have no ergogenic effects. Ingesting large doses of these vitamins hav
What is cloning? The Cloning is the making of an organism genetically identical to another by means of genetic engineering. The foundation of cloning is the nucleus transpla
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