Small population size is your answer mate.
Yes, as scientists could figure out what might have changed in the variables she used. Brainliest me and I can give you the whole system.
Porous and Impermeable Rock These pores, or tiny holes, result in the rock's porosity. If water can move through a rock, the rock is permeable. Eventually, the water reaches a layer of rock that is not porous. This rock is impermeable.
