East Island Disappearance and Tortoise Evolution

The video discusses the sudden disappearance of East Island in Hawaii due to Hurricane Walaka, highlighting its impact on endangered species like Hawaiian monk seals and green sea turtles. It also explores the debunking of the island gigantism theory in tortoises, revealing that giant tortoises evolved on the mainland before spreading to islands. The video concludes with a reminder of the importance of islands and information on SciShow's channel membership.

What was the main reason for East Island's disappearance?

• Tsunami

• Volcanic eruption

• Hurricane Walaka

• Rising sea levels

What percentage of Hawaiian monk seal pups were born on East Island before the storm?

• 10%

• 20%

• 30%

• 40%

Why is the loss of East Island significant for green sea turtles?

• It was their only food source

• It was their only habitat

• It was a major nesting ground

• It was their migration path

What was surprising about the disappearance of East Island?

• It was due to human activity

• It was caused by a volcanic eruption

• It was expected to happen over decades

• It was predicted by scientists

What is a direct consequence of global climate change according to the Intergovernmental Panel on Climate Change?

• Decreased biodiversity

• Increased storm severity

• Rising sea levels

• Increased volcanic activity

What theory about tortoise evolution was challenged by recent research?

• Island gigantism

• Natural selection

• Mainland extinction

• Continental drift

Where did giant tortoises likely evolve according to the new evolutionary tree?

• On islands

• In the ocean

• On the mainland

• In the Arctic

What might have helped giant tortoises survive the journey to islands?

• Their speed

• Their size

• Their diet

• Their camouflage

What is one reason biologists are still studying giant tortoises?

• To learn about their social behavior

• To discover their migration patterns

• To find out why they evolved on the mainland

• To understand their diet

What new feature has SciShow recently enabled on their channel?

• Live streaming

• Channel memberships

• Podcast series

• Merchandise store