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The logistic population growth is expressed by the equation:

1. (a) dN/dt = rN (K - N / K)
2. (b) dN/dt = rN (K - N / K)
3. (c) dN/dt = rN
4. (d) dN/dt = rN (N - K / N)

Correct answer: (b) dN/dt = rN (K - N / K)

Solution

Logistic growth starts like exponential growth when the population is small, but the rate decreases as N approaches the carrying capacity K. The option given as correct includes this density-dependent limiting term, unlike simple exponential growth.

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