Why might the hybrid offspring have higher survival rates than the offspring of the purebred salamanders?

Reading graphs: unemployment us unemployment rate (1961-2011) identify the trends in the graph and then use the drop- down menu to complete each statement from 1961 to 1965 unemployment was in the mid-2000s through 2011. unemployment was percentage unemployed 1961 1971 1981 1991 2001 2011 year

Exactly what kind of weather conditions would a cold front produce?

How long does it take for saturn to orbit the sun?