Question

question 20
heavy rains and mudslides cause a river to change course, isolating two groups of lizards of the same species from one another. over a long period of time,
one group will probably become an endemic species
one or both groups will probably become invasive species
both groups will probably become native species
the groups will probably diverge genetically, and speciation may occur
one or both groups will probably emigrate

Explanation:

When two groups of the same species are isolated due to a geographical barrier (like the river - course change here), over time, due to different environmental pressures and random genetic mutations, they may diverge genetically. This can lead to speciation. Endemic species are native to a particular area, but there's no indication one group will be restricted to a small area like that. Invasive species are non - native and cause harm, which isn't applicable here. They are already native, so becoming native isn't a likely new development. Emigration isn't the most likely long - term outcome compared to genetic divergence.

Answer:

the groups will probably diverge genetically, and speciation may occur