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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.
Explain the concpet of Dressing Dressing: Means medicine wound covering; a bandage or other sterile covering is put on a wound to protect it from infection or further damage.
Importance of vitamin D Vitamin D is mainly involved in the calcium and phosphate metabolism. It usually promotes absorption of calcium and inorganic phosphate from the intest
Decay and Nutrient Cycling Soil organisms are the chief agents of decay of organic matter. Decomposition and mineralisation of organic matter results in release of inorganic nu
Explain the systemic antibiotic cover The need for systemic antibiotic cover should be considered. The original protocols recommended an antibiotic such as amoxicillin 250 mg
Does thermal inversion occur in the winter or in the summer? Pollutant low altitude thermal inversion happens in the winter. In this period of the year the sun heats the soil l
Lamivudine This oral antiretroviral nucleoside analog used to treat HIV is also FDA-approved for treatment of chronic HBV infection. A trial in Asian patients with chronic HBV
Q. Explain Genetically Modified Organisms? Techniques that use gene modification through (a) recombinant DNA technology and (b) cellular techniques of introducing DNA into an o
Archaeological data provide valuable information about the uses of plants in the past. Information comes from a number of sources, including fossil plant and human remains as well
Define Biodiversity and ecosystem stability? Human's have transformed ecosystems all through the world, frequently replacing diverse natural ecosystems with ecosystems which ar
How are the antibodies against the Rh factor formed? The Anti-Rh antibodies are made by humoral immune response. When the Rh- individual makes contact with the Rh factor this i
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