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In the previous section we discussed the concept of species in detail and concluded that the concept of biological species and Mayr's definition of species have a wide acceptance among biologists. In this section we shall proceed to discuss the mechanisms of speciation or the mode of formation of a species. Mayr's definition of species amply makes it clear that to qualify for the title of the species, the individuals must be reproductively isolated from other groups. This naturally raises a question whether a new species could arise from populations occupying the same territory. In other words, should the populations of parent species live in quite separate territories in the formation of new species? In our earlier discussions. on natural selection, you have learnt that originmof adaptations is a gradual process, This is much more true of speciation. Biologists recognise three different kinds of speciation.
Q. What are the moderate intensity exercises? - Walking for 1/2% hr or jogging - Biking leisurely for 1/2 hr. - Playing tennis, swimming, gardening, golfing - Vacuumin
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Buffalo-pox The disease is caused by an orthopox virus, closely related to the vaccinia virus. It is not clear whether it should be considered a separate virus or not. By RE m
Few sentences about embryo
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Suppose the restriction endonuclease HindIII cuts a6.0 kb linear piece of DNA into two fragments; an 800 bp fragment and a 5200 bp fragment..... Question: Suppose restriction
uses of bacteriophage?\
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Explain the Management of Apical Canal Impediment Well angulated radiograph Coronal pre-flaring Pulp champer flooded with sodium hypochlorite Coronal passive
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