Wednesday, May 27 2020, 15:18 pm
NATIONALENTRANCESCREENING TEST(NEST– 2013) SETA

NATIONALENTRANCESCREENING TEST(NEST– 2013) SETA

industrial revolution in 1870s, booming industrial cities started releasing tons of black soot, blackening tree trunks and rocks and creating an environment where moths with light colours were easily predated by birds. Peppered moths captured in 1850 and 1900 reveal that two industrial cities (Xand Y) had the following percent distributions.