Moth Adaptation and Natural Selection

The video explains natural selection using the example of moths in Russia before and after the Industrial Revolution. Initially, light-colored moths were more common due to their ability to blend in with the snowy environment. However, post-Industrial Revolution, soot darkened the environment, favoring dark-colored moths. This shift illustrates the concept of survival of the fittest, where organisms best adapted to their environment are more likely to survive.

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

• The adaptation of polar bears

• The moth example

• The migration of birds

• The evolution of giraffes

Before the Industrial Revolution, which type of moth was more likely to survive in Russia?

• Neither type

• Both types equally

• Light-colored moths

• Dark-colored moths

Why were dark moths less common before the Industrial Revolution?

• They were more visible to predators

• They were less attractive to mates

• They were less efficient at finding food

• They had a shorter lifespan

Which of the following best describes the environment in Russia before the Industrial Revolution?

• Warm and dry

• Temperate with little snow

• Cold with lots of snow

• Hot and humid

What environmental change occurred during the Industrial Revolution that affected moth populations?

• Increase in rainfall

• Decrease in food supply

• Rise in temperature

• Accumulation of soot on snow

After the Industrial Revolution, which type of moth became more common?

• Both types equally

• Light-colored moths

• Dark-colored moths

• Neither type

How did the Industrial Revolution initially affect the environment in terms of snow color?

• It turned the snow dark with soot

• It had no effect on the snow

• It made the snow whiter

• It melted the snow

What was the primary reason for the decline of white moths after the Industrial Revolution?

• They were hunted by humans

• They could not blend into the soot-covered environment

• They stopped reproducing

• They migrated to other regions

What does 'survival of the fittest' actually mean in the context of natural selection?

• The most intelligent individuals survive

• The fastest individuals survive

• The individuals best adapted to their environment survive

• The strongest individuals survive

What is the key factor that determines the survival of organisms according to natural selection?

• Adaptation to the environment

• Intelligence

• Strength

• Speed