In a population growth curve,which of the following equations represents the sigmoid growth curve?

  • A
    $\frac{dN}{dt} = rN$
  • B
    $\frac{dN}{dt} = rN \left( \frac{K-N}{K} \right)$
  • C
    $N_{t+1} = N_t + [(B+I) - (D+E)]$
  • D
    None of these

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