Question

What was found in collections from the same area around 1920 after industrialisation?

Options

• More dark-winged moths were found, and the earlier proportion was reversed.

• More white-winged moths were found, and the earlier proportion remained unchanged.

• Only moths with functional gill slits were found.

• All moth variants were completely wiped out.

Answer 1

After industrialisation, around 1920, more dark-winged moths were found in the same area. Thus, the earlier proportion of white-winged and dark-winged moths was reversed.