Practice Quiz

AP Environmental Science

Category - AP Environmental Science

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Real populations-both human and nonhuman-do not grow indefinitely. In reality, a population will grow until it reaches its limit, known as the carrying capacity. What is the correct equation for this type of growth?
  1. dN/dt = rN[(K - N)/K]
  2. dN/dt = rN[1 - (K/N)]
  3. dN/dt = (b - d)N
  4. Both answer A and B could be correct
Explanation
Answer: D - Both A and B could be correct as the equation for carrying capacity growth.

Key Takeaway: Ultimately, real populations do not grow indefinitely (which is what option C would imply). In reality, populations grow until they run out of space or resources. This limit is called the carrying capacity (K) of a given environment.

Again, the equation for this type of growth is:
dN/dt = rN[(K - N)/K] or dN/dt = rN[1 - (K/N)]
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