Ineed pls 50 ! distinguish between directional, stabilizing, and disruptive selection. give examples.

All three types of selection are trends across generations in which the average frequency of a trait in a population changes. Population ecologists use ALLELE FREQUENCIES (the proportions of VARIABLE alleles at a given gene locus measured in a population) and measure change across generations.

This is easiest visualized using normal graphs - most individuals in the population will be average (or MEAN) and become fewer at the extremes.

For example, here is a graph of human IQ. 100 is the mean. As it goes higher or lower, there are fewer individuals with those IQ's.

i think that c)gold was found there

but i am not sure

the framers of the constitution insisted that federal judges be nominated instead of elected due to their desire to have judges above the shifting whims of the masses.

the hope, whether achieved or not, was that federal judges would only be beholden to the law and that by not having judges be elected, they would be protected if that law dictated an outcome that ran counter to popular opinion.