Which of the following is an assumption made by the logistic model? A. Every individual has the same negative effect on population growth rate, independent of density. B. Populations that reach carrying capacity always experience a delay before the negative effects occur. C. There are no other species competing for the same resources as the observed population. D. There is no immigration or emigration of individuals occurring within the population.

Biology · Middle School · Mon Jan 18 2021

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Option d is correct. 

An assumption made by the logistic model : There is no immigration or emigration of individuals occurring within the population. 

Assumptions of the logistic growth model. 

1) no immigration/emigration - closed population. 

2) no genetic structure- all equally fit to reproduce. 

3) no age or size structure. 

4) continuous time growth, no lags.