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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.
State the types of bone density Misch classified bone density into following types (1988) D1. Dense cortical bone- which is almost never observed in maxilla and approximatel
SURGERY FOR CORONARY ARTERY DISEASE : Stenotic coronary artery disease (CAD) is caused by the thickening and narrowing of the coronary arteries (Atherosclerosis). Initially it cau
Subphylum Urochordata : (13,000 species, sea squirts) Notocord is dorally situated, nerve tube dorsally situated and is hollow, chordate characteristics seen mainly in bilatera
Q. What are the intermediate and the definitive hosts of the plasmodium? In the life-cycle of the plasmodium humans are the intermediate hosts (where asexual reproduction takes
ME T AMORPHOSIS The differentiation results in the formation of larva / infant. The formation of adult from the larva / infant is called as metamorphosis. The metamorph
Is the ventricle lumen larger during systole or during diastole? Systole is the stage of the cardiac cycle on which the ventricles contract. So the lumen of these chambers is d
Why the rate of photosynthesis does increases, peak, and then reduces as temperature increases? Increasing the temperature initially accelerates the many chemical reactions in
Describe about Postural Changes in Dynamic Auscultation? a) On sudden assumption of supine position from standing on sitting position or sudden passive elevation of both legs:
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Why after the passage of animals from the aquatic to the terrestrial habitat does the abandonment of the ammoniotelic excretion occur? Ammonia is a highly toxic molecule if not
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