Peppered Moths and Natural Selection

The video discusses the evolution of peppered moths as evidence of Darwin's theory of natural selection. Before the Industrial Revolution, only the white typa moth existed. Pollution darkened trees, leading to the emergence of the black carbonaria moth, which camouflaged better. This change is attributed to the decline of lichen due to pollution. Biologist Bernard Kettlewell's experiment further proved this evolution by showing different moth populations in polluted and unpolluted forests.

What is the main idea behind Darwin's theory of evolution by natural selection?

• Species develop traits that help them survive and reproduce in their natural habitats.

• Species evolve by chance without any influence from their environment.

• Species remain unchanged over time.

• Species evolve only through human intervention.

Before the Industrial Revolution, what was the predominant species of peppered moth?

• The black carbonaria moth

• There were no peppered moths

• The white typa moth

• Both species were equally common

How did the Industrial Revolution affect the peppered moths?

• It caused the extinction of the peppered moths.

• It made the white typa moth more common.

• It led to the emergence of a new species, the black carbonaria moth.

• It had no impact on the peppered moths.

What role did lichen play in the color of trees before the Industrial Revolution?

• Lichen gave the trees a whitish color.

• Lichen had no effect on the trees' color.

• Lichen made the trees green.

• Lichen made the trees darker.

Why did the peppered moths need to change color after the trees darkened?

• To migrate to new areas

• To find food more easily

• To avoid predators

• To attract mates

What is the significance of the carbonaria species in the context of natural selection?

• It indicates that all species will eventually become extinct.

• It proves that species cannot change over time.

• It suggests that evolution is a random process.

• It shows that species can evolve new traits to adapt to environmental changes.

What was the purpose of Bernard Kettlewell's experiment?

• To find new species of moths

• To show that pollution has no effect on wildlife

• To demonstrate the role of natural selection in the evolution of peppered moths

• To prove that moths cannot adapt to environmental changes

In Kettlewell's experiment, what was observed in the polluted forests?

• More white typa moths than carbonaria moths

• More carbonaria moths than white typa moths

• Equal numbers of both moth species

• No moths were found

What conclusion can be drawn from Kettlewell's findings in unpolluted forests?

• White typa moths were more common

• Carbonaria moths were more common

• No moths were found

• Both species were equally common

How did Kettlewell's experiment support Darwin's theory?

• It suggested that evolution is a myth.

• It disproved the theory of evolution.

• It provided evidence of natural selection in action.

• It showed that species do not change over time.