New species evolve in a short time scale of months or years due to anthropogenic actions or human activities. This hastens the evolutionary process.
1. During post industrialization period in England, the tree trunks were covered by dust, coal particles and thus became dark. On such trunks, white moths could be easily picked up leaving the dark-peppered moths.
2. Due to excessive use of antibiotics or herbicides, new resistance varieties of organisms appeared. These resistant varieties got selected over the non-resistant varieties.