Extinction Events and Evolution Concepts

The video explains extinction, the process by which species cease to exist. It discusses how evolution and adaptation affect species survival, with less adapted species failing to reproduce. Over 99% of species that have ever lived are now extinct. Some species, known as living fossils, have remained unchanged for millions of years. The video also covers mass extinction events, such as the KT event that wiped out the dinosaurs. Currently, species are becoming extinct at an alarming rate due to human activities, and the video suggests solutions like reducing habitat destruction and carbon footprints to mitigate this crisis.

What does it mean for a species to become extinct?

• It evolves into a new species.

• It stops existing entirely.

• It migrates to a new habitat.

• It becomes endangered.

According to the theory of evolution, why do some individuals survive better than others?

• They are more aggressive.

• They have better-suited characteristics for their environment.

• They are larger in size.

• They are more intelligent.

What happens to the genes of less well-adapted individuals over time?

• They become dominant in the population.

• They are removed from the population.

• They mutate into new genes.

• They become more diverse.

What percentage of all species that have ever lived are now extinct?

• 25%

• 99%

• 75%

• 50%

What are 'living fossils'?

• Newly discovered species.

• Fossils that are still alive.

• Species that have remained unchanged for millions of years.

• Species that have gone extinct recently.

Which event is known for causing the extinction of the dinosaurs?

• The Ordovician extinction event.

• The KT extinction event.

• The Triassic extinction event.

• The Permian extinction event.

What was the most devastating extinction event in Earth's history?

• The Ordovician extinction event.

• The Permian extinction event.

• The KT extinction event.

• The Triassic extinction event.

What is a major concern for biologists and ecologists today?

• The alarming rate of current extinctions.

• The increase in new species.

• The rise in sea levels.

• The decrease in human population.

What is one suggested action to help slow down the extinction crisis?

• Encourage deforestation.

• Lower our carbon footprint.

• Promote habitat destruction.

• Increase fossil fuel usage.

By what year is it estimated that 50% of all living species may be extinct?

• 2050

• 2300

• 2100

• 2200