Which option is correct for curve $a$ and $b$ ?

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Equation for equation for Type of Type of

Curve $(a)$ curve $(b)$ curve $(a)$ curve $(b)$

Carrying capacity is

If birth rate is $100 ,$ death rate is $10$ and number of individuals in population group is $1000 ,$ then what will be the percentage of natural growth rate?

Logistic growth is represented by which equation

In a population, the condition at which the rate of addition of new members is more than the rate of individuals lost indicates