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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.
Define the Interaction of Vitamin C with iron? Ascorbic acid powerfully enhances absorption of non- haem iron and reverses the inhibiting effect of tea and calcium phosphate. I
Explain Potential Health Benefits of Dietary Fibre? A number of experimental studies in animal models, as well as, epidemiological studies have established protective role of d
A r se n i c Arsenic is a widely distributed environmental pollutant that gets released into the environment through industrial processes and agricultural usage. Arsenic c
Explain the term Direct Calorimetry? Calorimetry refers to the measurement of the amount of heat evolved or absorbed in a chemical reaction, change of state, or formation of a
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im stuck on this question where we have to make a table of averages using quadrats and transect lines can you help me?
VAS A DIFFRENTIA - Originate from wollfian duct . It comes out fo cauda epdidymis enters into abdominal cavity through inguinal canal, forms loop round the uretor and j
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Q. Adaptation and learning function of Consciousness? Adaptation and learning function: Adaptation to novel experiences requires more conscious involvement, for successful lear
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