પ્રકૃતિ અને વિકાસ
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Questions and Answers

એડાપ્ટિવ રેડિએશન શું છે?

  • DNA સીક્વેન્સ તુલના કરવા દ્વારા પ્રજા વૃt_E^3
  • Sympatric speciation
  • જીવાશ્રય સ્થળો પર બદલાવ આવ્યો હોવાથી પોપ્યુલેશન જેમ વિવિધ પ્રકારે તૈયાર થવી શરૂ કરે છે. (correct)
  • Fossil record ની મુl_C^2
  • DNA સીક્વેન્સ તુl_A^3

  • Allopatric speciation (correct)
  • Biogeography
  • Genetic drift
  • Comparative anatomy
  • Parapatric speciation ની વ્l_C^3

  • Adaptive radiation
  • Allopatric speciation (correct)
  • Sympatric speciation
  • Fossil record
  • Sympatric speciation શુo_A^2?

    <p>Speciation occurring in the same geographic area</p> Signup and view all the answers

    Fossil record શુo_B^2?

    <p>A fossil record helps show the change in species over long periods of time</p> Signup and view all the answers

    Comparative anatomy ની મl_A^3?

    <p>Comparing anatomical structures across different species can provide evidence of common ancestry</p> Signup and view all the answers

    કયું પ્રકાર પ્રાકૃતિક ચયન વધુ પોતાની સજીવૂક્ષમતા અને પ્રજનન સફળતા વધારવું?

    <p>સુવાગ</p> Signup and view all the answers

    સ્ ખୁ ુ ୁ ୁ ୁ ୁ ୁ ୁ, ુ ଗ ୁ ୁ ୁ , 1 , 6 , , , , , , , , , , , , , , , , , ,

    <p>5(7 + 3)</p> Signup and view all the answers

    કે પ્ર୐ିିିିିିିିା ુ ସ ୁ ୁ, ୁ, ୟ, ଂ, இଂ, 3,4, ,,,7,,8,,

    <p>5 * 10</p> Signup and view all the answers

    ି, ୁ ଡେେଂଂ, ଁୁ,ୁ,,୧,, ,, ,, ,,

    <p>$100 + $100</p> Signup and view all the answers

    ଂ, ଂ,ମ,,ଁ,ଂ,,ଁ,,

    <p>$100 * 4</p> Signup and view all the answers

    ଂସଂଁି,଴ଁସ,,,

    <p>$600 / 3</p> Signup and view all the answers

    Study Notes

    Evolution

    Evolution is the process by which species change over time. It involves changes in gene frequency within populations from generation to generation. There are several mechanisms driving this change including: natural selection, genetic drift, speciation, and evidence supporting the theory.

    Natural Selection

    Natural selection is the process by which certain traits become more or less common in a population over time due to their impact on an organism's ability to survive and reproduce. This can happen through several means:

    • Survival advantage: Traits that increase survival rates are favored as they lead to more offspring.
    • Reproductive success: Traits that enhance reproductive capabilities will be passed down if they help individuals produce more offspring.
    • Random variation: Occasionally, there are small differences among individuals within populations. These variations can result from mutations, genetic recombination, or gene flow from other populations.

    Genetic Drift

    Genetic drift occurs when allele frequencies change randomly from generation to generation. It doesn't depend on natural selection but can still drive significant evolution. It is more likely to occur in small populations and can lead to changes in gene frequencies that may be beneficial, neutral, or detrimental.

    Speciation

    Speciation is the process by which new species evolve from a common ancestor. It can occur through a variety of mechanisms, including:

    • Allopatric speciation: speciation occurring when populations become geographically isolated.
    • Sympatric speciation: speciation occurring in the same geographic area.
    • Parapatric speciation: speciation occurring in areas where the potential for interbreeding exists, but actual interbreeding between populations is rare.

    Evidence of Evolution

    The evidence supporting the theory of evolution is extensive and includes:

    • Fossil record: A fossil record helps show the change in species over long periods of time.
    • Comparative anatomy: Comparing anatomical structures across different species can provide evidence of common ancestry.
    • DNA sequence comparisons: Comparing DNA sequences can reveal the relationships between different species.
    • Biogeography: The distribution of species across geographic areas can provide evidence of speciation.
    • Adaptive radiation: The diversification of species from a common ancestor in response to ecological opportunities.

    Adaptive Radiation

    Adaptive radiation is a process of speciation where populations rapidly diversify due to ecological opportunities. This often occurs in response to environmental changes, such as a new island geography or changes in climate. An example of this can be found in Darwin's finches on Galapagos Islands.

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    પ્રાણીઓની પ્રજા અંદર જેવા પ્રકારો જે સમય પર બદલાવો અને વિકાસ મુક્તી. સ્પષ્ટ વિવાહ અને ભૌગોલિક વिभેદો મુક્તી મેકે; આ સ્પષ્ટ પ્રജാ.

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