Marine Iguanas: Adaptations and Research

The video explores the Galápagos Islands, highlighting their unique environment and connection to Darwin's theory of evolution. It focuses on marine iguanas, which have adapted to swim and survive in cold waters. Recent research reveals their ability to shrink and grow in response to environmental changes, a phenomenon studied using x-rays to understand bone reabsorption. This adaptation is crucial for survival, especially during El Niño events.

What makes the Galápagos Islands particularly significant in the study of evolution?

• They are the birthplace of Charles Darwin.

• They are the largest islands in the Pacific Ocean.

• They are home to the world's largest lizard.

• They have a unique and bizarre ecosystem.

What unique behavior do marine iguanas exhibit that no other lizard does?

• They hibernate.

• They fly.

• They change color.

• They swim in the sea.

Which of the following is NOT an adaptation of marine iguanas?

• Strong tails

• Razor teeth

• Ability to fly

• Sharp claws

What environmental event causes marine iguanas to shrink?

• Earthquake

• Tornado

• Hurricane

• El Niño

What is the primary reason marine iguanas shrink during certain conditions?

• To attract mates

• To migrate to warmer areas

• To avoid predators

• To conserve energy when food is scarce

What tool do scientists use to study the bone structure of marine iguanas?

• Microscope

• Telescope

• X-ray machine

• Ultrasound

How do marine iguanas manage to grow back after shrinking?

• By migrating to warmer waters

• By eating more insects

• By reabsorbing and regrowing bone

• By basking in the sun

What is the main focus of Greg Lewbart's research on marine iguanas?

• Their mating rituals

• Their ability to change size

• Their migration patterns

• Their diet

What analogy is used to describe the iguanas' ability to shrink and grow?

• A balloon

• A spring

• An accordion

• A rubber band

Why is the ability to shrink and grow increasingly vital for marine iguanas?

• To avoid new predators

• To find new habitats

• Due to rising sea levels

• Because of climate change