Directional selection can be distinguished from disruptive selection by
a. the elimination of extreme variations of traits
b. selection for two extreme variations of a trait
c. the preservation of gene frequencies
d. selection for one extreme variation of a trait select the best answer from the choices provided a b c d

What do sensory neurons do? for science

Which type of market produces the highest level of output at the lowest price to consumers?

Aprovision of the general agreement on tariffs and trade treaty (gatt)increased taxes on services between the us, mexico, and canada. reduced international tariffs on industrial goods by forty percent. increased us tariffs on agricultural products by forty percent. ended taxes on goods traded by the us, mexico, and canada.