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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.
To which direction does the growth of one side of branch, a stem or root induce the structure to curve? Whenever one side of a branch, stem or root grows more than the other si
Subphylum Urochordata : (13,000 species, sea squirts) Notocord is dorally situated, nerve tube dorsally situated and is hollow, chordate characteristics seen mainly in bilatera
Impact of Technological Change on the Cost of Health Service Technological developments entail improvement in production/service frontiers either by providing cost benefit adv
Haploid Production The higher plants are normally diploid, with two sets of chromosomes in their somatic cells. Their haploids (with one set of chromosomes) arise in nature by
Define the Skeletal muscle A. Binding of calcium ion to its receptor site on the actin molecule blocks the attachment of the head of the tropomyosin molecule to its binding sit
Dot blot is the technique for measuring the amount of one perticular DNA or RNA in the highly complex mixture. The samples are spotted onto the hybridization membrane (like nitroc
Respiratory Care on Admission (First two hours) Patient is incubated and ventilator-dependent. Monitor blood gases hourly and take corrective action immediately.
list out sex limited traits in farm animals
whatis a prokaryotic cell? explain its structure and description with images
What is diffusion? Diffusion is the spreading of substance molecules from a region where the substance is more concentrated to another region where it is less concentrated. For
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