Natural Selection and the Peppered Moth

The video discusses the peppered moth as a classic example of natural selection. Initially, most moths were light-colored, but with industrial pollution, dark-colored moths became more common due to better camouflage. Kettlewell's experiments confirmed that moth survival varied with environmental conditions. As pollution decreased, the frequency of dark moths declined, illustrating natural selection. Ongoing research aims to identify the genetic differences between moth morphs.

What is the primary example used to illustrate natural selection in this video?

• The Galapagos finches

• The peppered moth

• The polar bear

• The African elephant

What significant change occurred in the peppered moth population by 1900?

• The moths became extinct

• The majority were of the melanic form

• The moths migrated to another region

• The moths developed new feeding habits

What was the main purpose of Kettlewell's experiments?

• To find new species of moths

• To show that moths can change color at will

• To demonstrate the survival advantage of different moth types in various environments

• To prove that pollution directly changes moth color

In Kettlewell's experiments, which moth type had higher survival in polluted areas?

• Both had equal survival

• Neither survived well

• The melanic moths

• The white moths

What happened to the frequency of the melanic moths as pollution levels decreased?

• It increased

• It decreased

• It fluctuated randomly

• It remained the same

What does the change in moth coloration as pollution decreased demonstrate?

• Moths are immune to environmental changes

• Pollution has no effect on moths

• Natural selection can reverse traits based on environmental changes

• Moths can change color at will

What is the current focus of research on the peppered moth?

• Studying moth migration patterns

• Identifying the genetic basis of color variation

• Developing moth-resistant plants

• Finding new species of moths

What does the ongoing research on the peppered moth illustrate about science?

• Science is static and unchanging

• Science is complete and needs no further study

• Science is only about proving existing theories

• Science is dynamic and continuously evolving

Which of the following is NOT a factor in the natural selection of the peppered moth?

• Predation by birds

• Pollution levels

• Human intervention in moth breeding

• Color of the trees

What does the peppered moth example primarily teach us about evolution?

• Evolution is a slow process

• Evolution can occur rapidly in response to environmental changes

• Evolution is only about physical changes

• Evolution is unpredictable and random