Question

populations lacking any environmental resistance tend to increase by___.
exponential growth
pyramidal growth
linear growth
emigration
immigration

Explanation:

When populations lack environmental resistance (such as limited resources, predators, etc.), they can grow without constraints. Exponential growth ($N_t = N_0e^{rt}$, where $N_t$ is the population at time $t$, $N_0$ is the initial population, $r$ is the intrinsic growth rate, and $e$ is the base of the natural logarithm) occurs under ideal conditions with no limiting factors. Pyramidal growth is more about the age - structure of a population (broad base indicating a high proportion of young individuals). Linear growth ($N_t=N_0 + rt$) is a very simplistic and less common model in real - world population biology as it assumes a constant rate of increase without considering the multiplicative nature of population growth in the absence of constraints. Emigration is the movement of individuals out of a population (would decrease population size), and immigration is the movement of individuals into a population (can increase it, but it's not the fundamental growth pattern in the absence of environmental resistance).

Answer:

exponential growth