Which of the following causes populations to shift most quickly from a logistic to an exponential population growth?

a. favorable climatic conditions

b. removal of competitors

c. decreased death rate

d. competition for resources

e. increased birth rate

Option E

Explanation:

As per Thomas Malthus, population of any specie will grow tremendously when resources are supplied in an unlimited amount. Extensive resource supply will reduce competition among species thereby further boosting population growth. This accelerated growth in population is termed as exponential growth.  In general, in an exponential population the birth rate or the rate by which population is increasing either constant through out or increases after certain period of time.

Population of bacteria grows exponentially in case of adequate resource availability as the growth rate remains adequate through out the life cycle.  However, in real world resources are limited and hence exponential population growth is not possible.  

Hence, option E is correct

The correct answer would be - option B.

Explanation:

The shift from the logistic population growth to exponential growth takes place if the resources are enough and if there would be enough resources for a population there will be fewer or no competitions. Sufficient resources are only present in favorable conditions.  

If the resources are unlimited it shows the growth rate in the population by using the natural resources, this increase is called exponential population growth, removal of competitors will lead to less utilization of the resources other than the desirable population and it will increase.

Thus, the correct answer is - option B.

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