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Natality

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Nataliya is the rate of production of new individuals in a population per unit time per unit area.
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Give the term for pre-natal diagnostic technique aimed to know the sex of developing foetus and congenital disorders'

Which of the following statements are correct? I. Mortality is the rate of loss of individuals per unit time due to death. II. Population dispersion affects the size of population. III. Age distribution influences both natality and mortality of the population. IV. Realised natality is the actual death rate found under existing conditions.

Knowledge Check

  • If the are non-limiting or unlimited conditions are provided than what what will happen to population I. natality increase II. Mortality decrease III. Mortality increase IV. Natality decrease Choose the correct combination

    A
    I and II
    B
    I and III
    C
    I and IV
    D
    IV and III

  • In a population of an area, the difference in the natality rate and mortality rate is zero in a particular year, but the population density has decreased. Which of the following may be the reason for this decrease ?

    A
    Number of immigrants `gt` Number of emigrants
    B
    Number of immigrants / Number of emigrants = 1
    C
    Number of immigrants `lt` Number of emigrants
    D
    Number of immigrants = Number of emigrants

  • In a population of an area, natality was equal to mortality for a given time equal to mortality for a given time period. However, the population density of the population increased, whih of the following may be the reason for the increases ?

    A
    Number of immigrants = number of emigrants
    B
    Number of immigrants gt Number of emigrants
    C
    Number of immigrants lt Number of emigrants
    D
    Cannot be predicted

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    Assertion : In post natal life , oocyte development occurs in mature follicle Reason : After ovulation , Graafian follicle transforms in corpus luteum

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