isolating mechanism sentence in Hindi
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- Stern suggests this may serve as a reproductive isolating mechanism between the two species.
- Dobzhansky presents a classification of isolating mechanisms.
- Gould was particularly attracted to Douglas Futuyma's work on the importance of reproductive isolating mechanisms.
- An " isolating mechanism " prevents members of two different species from successfully producing offspring.
- This demonstrates evidence of an early post-fertilization isolating mechanism, in which the hybrid early embryo is detected and selectively aborted.
- He was skeptical of the reality of sympatric speciation believing that geographical isolation was a prerequisite for building up intrinsic ( reproductive ) isolating mechanisms.
- Another well-documented example of a pre-fertilization isolating mechanism in plants comes from study of the 2 wind-pollinated birch species.
- In such cases, selection gives rise to population-specific isolating mechanisms to prevent either fertilization by interspecific gametes or the development of hybrid embryos.
- After two populations are changed sufficiently, " physiological " isolating mechanisms prevent them from mating, so they will remain distinct even if they are no longer physically isolated.
- The effect of this change in interpretation is to put the emphasis for speciation onto natural selection for appropriate food handling instead of seeing it primarily as a by-product of an isolating mechanism.
- The " Origin of Species " was published nearly twenty years after Wagner's first account, but more relevant is the evidence of his ethological [ behavioural ] isolating mechanisms " but his inferences about geographical speciation were important insights gained by observation of insects in their natural habitats.
- An isolating mechanism between the two species may be the fact that " F . vesiculosus " normally reproduces sexually whereas " F . radicans " shows a much greater tendency to reproduce asexually, with detached fragments having the ability to take root and develop into new plants.
- :" It took more than 60 years after 1859 until the leading specialists . . . [ agreed ] that this geographical approach was the way to solve the problem of speciation . . . a new species may evolve when a population acquires isolating mechanisms while isolated from its parent population . ".
- :" The person who more than anyone else deserves credit for reviving an interest in the ecological significance of species was David Lack . . . It is now quite clear that the process of speciation is not completed by the acquisition of isolating mechanisms but requires also the acquisition of adaptations that permit co-existence with potential competitors ."
- Holley and Greenley ( 2005, p . 96 ) state that social context of certain resource conditions act as an element to create isolating mechanisms and quote Wernerfelt ( 1986 ) that tacitness ( accumulated skill-based resources acquired through learning by doing ) complexity ( large number of inter-related resources being used ) and specificity ( dedication of certain resources to specific activities ) and ultimately, these three characteristics will result in a competitive barrier.
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