What does a population graph with j-curve show?

An expontential growth followed by an abrupt stop

Explanation:

A  j-curve shaped graph means a given population started to grow rapidly in exponential form until for some reason it stops growing and decreases. The causes for this can be Seasonality of some species, Which growth peaks at a given season but at the change of seasons the environment is no more ideal for them and the growth starts decreasing. Other causes can be a population of organisms which breeding is so effective and numerous that in this phase they have exponential growth in their population.

b because they naturally adapt to their environment plz mark brainliest

explanation:

not sure if this is what you'r looking for eubacteria and archaebacteria