In a town in England, the wings of a local butterfly species had a black and white pattern. Over the years, as air pollution worsened in the town, a coat of black soot often covered everything. From an evolutionary perspective, which of the following is a logical sequencing?
◦ Butterflies became blacker because the ones with relatively more black on their wings were most likely to blend in with the sooty background.
◦ Butterflies became lighter because the ones with relatively more white on their wings were least likely to blend in with the sooty background.
◦ Butterflies became more aggressive because their behaviors were altered by the toxins that were in the black soot.
◦ Butterflies morphed into moths because environmental conditions triggered an unfolding of a hidden gene.
The five different types of leukocytes (white blood cells).
Sweet White Clover
Ben Jones, Black Face and Arm Unit.
David Usher - Black Black Heart
Other countries are “Americanizing” their local culture’s diet