Answer: laboratory experiments
Explanation:
Exponential growth can be define as the increase in per capita growth of the population when the resources available are surplus. A limiting factor is the one which is capable of limiting the growth, abundance and distribution of population of species. Predator populations, habitat conditions and food resources all are examples of limiting factors which can limit the growth of population exponentially.
Laboratory experiments cannot be consider as limiting factor hence, are not responsible for limiting the exponential growth.
