A density dependent limiting factor is described as

A density dependent limiting factor is described as

• A. A factor that limits population growth regardless of population size
• B. Changes in intensity with population size
• C. A factor that only affects a single species
• D. A factor that only occurs at carrying capacity

Answer: (B)

Density-dependent limiting factors are factors whose impact on a population changes as the number of individuals changes. As population size increases, competition for resources intensifies, disease transmission rises due to closer contact, and reproductive or survival rates can be more strongly affected. When populations are small, these factors have a weaker effect, allowing more growth, whereas at larger sizes they curb growth more sharply. This is different from density-independent factors like weather or natural disasters, which affect populations regardless of how many individuals are present. The best choice captures the idea that the intensity of the limiting factor varies with population size. The other options describe factors that either act regardless of size, affect only particular species, or occur only at a specific density, which doesn’t define density dependence.

Density-dependent limiting factors are factors whose impact on a population changes as the number of individuals changes. As population size increases, competition for resources intensifies, disease transmission rises due to closer contact, and reproductive or survival rates can be more strongly affected. When populations are small, these factors have a weaker effect, allowing more growth, whereas at larger sizes they curb growth more sharply. This is different from density-independent factors like weather or natural disasters, which affect populations regardless of how many individuals are present. The best choice captures the idea that the intensity of the limiting factor varies with population size. The other options describe factors that either act regardless of size, affect only particular species, or occur only at a specific density, which doesn’t define density dependence.