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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.
Q. Is monoculture a system that contributes to great biological diversity of an ecosystem? The Monoculture implies that in a large area a single crop (only one species of plant
Food Applications of Curdlan Curdlan has a variety of food applications as enumerated herewith: a) Meat and Poultry Curdlan makes meat and poultry products juicier and
difference between optic nerve and auditory nerve
Nutrient Elements of Plants Let us first find out the chemical composition of plants and see which element nature has selected to support their healthy growth. Only then we wi
What is Oogenesis ? The female sex cells, or eggs, are formed in the ovaries, the primary sex organs of the female. The precursor of the egg cells, or oogonia, are formed duri
what is meant by thigmotropism?
Principles Governing Cleavage a) The nucleus and mitotic achromatic figure tend to occupy the centre of active cytoplasmic density of the dividing cells, e.g., in isolecithal
Q. What is Multi-gated equilibrium radionuclide angiography? Multi-gated equilibrium radionuclide angiography (MUGA) is a very accurate method in measuring ejection fraction. R
Q. Write the meaning of Polyuria? Increased Urine (Polyuria): When sugar is increased in the blood it is filtered from the body along with the water. This is the reason for fre
Concerning the sex chromosomes of the XY system which type of gamete do the male and the female individuals respectively produce? An Individual of the female sex is XX and thus
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