Cane Toads and Evolutionary Changes

The video explores the rapid evolutionary changes in cane toads in Australia, where they have become cannibalistic to control their population. Introduced in 1935 as a biocontrol measure, these toads have become invasive, leading to significant ecological impacts. The video compares this rapid evolution with the famous Siberian fox experiment, highlighting how evolution can occur quickly under environmental pressures.

What evolutionary change has been observed in cane toads in Australia?

• They have developed wings.

• They have become cannibalistic.

• They have become herbivores.

• They have started to hibernate.

Why were cane toads originally introduced to Australia?

• To control the population of cane beetles.

• To increase biodiversity.

• To serve as a food source.

• To replace native frog species.

What is the main problem caused by the cane toads in Australia?

• They attract more predators.

• They consume all the crops.

• They are poisonous and have become a pest.

• They cause soil erosion.

What is the purpose of the educational film 'Cane Toads: An Unnatural History'?

• To promote the introduction of more cane toads.

• To educate about the invasive pest problem.

• To show the beauty of cane toads.

• To teach how to domesticate cane toads.

What triggers the cannibalistic behavior in cane toad tadpoles?

• Presence of predators.

• Lack of food.

• Presence of a specific toxin.

• High temperatures.

How do scientists prevent native animals from eating cane toads?

• By changing the toads' habitat.

• By removing all cane toads.

• By introducing new predators.

• By using Pavlovian conditioning experiments.

What is the main reason for the cane toads' cannibalistic behavior?

• To increase their size.

• To reduce their population for survival.

• To attract mates.

• To adapt to colder climates.

What was the outcome of the Belair fox experiment?

• Foxes became extinct.

• Foxes developed traits similar to domestic dogs.

• Foxes became more aggressive.

• Foxes started to fly.

What does the rapid evolution of cane toads demonstrate?

• Evolution is not observable.

• Evolution can occur rapidly under certain conditions.

• Evolution always takes millions of years.

• Evolution only occurs in isolated environments.

What is a significant physical change observed in the foxes from the Belair experiment?

• They developed scales.

• They lost their fur.

• They grew larger in size.

• They developed bushy tails and floppy ears.