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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.
what are structural adaptation of flatworm to it''s enviroment /
disadvanatge of protozoa
Q. Despite having a great biodiversity why is the Amazon Rainforest under risk of desertification? The natural soil of the Amazon Rainforest isn't very fertile but it is enrich
what is binomial nomenclature? What are the importance of it?
Given our knowledge so far we now need to evaluate if it is feasible to run the process in the designed vessel. We therefore need to compare the oxygen uptake rate and the oxygen t
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which of the following is most likely to be true of microbial metabolism? 1)Acetyl-CoA is converted directly into 2 ATP 2)The energy from 2 ATP is necessary to drive the electron t
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Determine about the Sense of Contrast It is the ability to perceive slight changes in luminance between regions which are not separated by definite borders. This is
What Devices Used for Oxygen Therapy? Variable performance systems: With these devices, the FiO 2 would vary depending on the patient's breathing pattern. In general, rapid, s
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