B5.2.1 - Natural selection Flashcards
What is evolution?
The gradual change in species over time
What is natural selection?
The process by which specie best suited to their environment will survive and reproduce, passing their beneficial characteristics to offspring
What is an anti-biotic resistant bacteria?
An advantageous mutation which allows the bacteria to resist anti-biotics. The bacteria that are resistant then go on to reproduce
What is the evolution of pepper moths?
Before the 19th century most moths were light but there were some dark moths due to a mutation. These were easily seen by birds and eaten. However during the Industrial Revolution many trees became covered in soot allowing black moths to camouflage so more of them survived. After several years, dark peppered moths became more common than pale moths in urban areas
