How Did You Get Here?! (Unexpected Ways Species Travel the World)

The video explores the concept of disjunct distribution, where species are found in unexpected locations. It highlights human influence on species spread, using the example of pygmy shrews in Ireland. The video also discusses natural causes of distribution, such as range fragmentation in armadillos and continental drift affecting marsupials. Biological adaptations like mangrove seed buoyancy and unique dispersal methods of killifish are examined. Finally, it covers iguanas crossing oceans via natural rafts, illustrating the complex ways species distribute globally.

What is the term for when two species with a common ancestor are found far apart geographically?

• Range Fragmentation

• Biological Dispersion

• Disjunct Distribution

• Continental Drift

How did the Eurasian Pygmy shrew likely arrive in Ireland?

• By swimming across the sea

• Through a land bridge

• By hitching a ride with humans

• By flying

What is range fragmentation?

• The movement of species across continents

• The merging of different species into one habitat

• The splitting of a species' habitat into separate areas

• The adaptation of species to new climates

How did marsupials likely spread to Australia?

• Via the supercontinent Gondwana

• By flying

• Through a land bridge

• By swimming

What adaptation helps mangrove seeds travel long distances?

• Being colorful

• Being sticky

• Being buoyant

• Being lightweight

How can killifish eggs end up in new habitats?

• By surviving digestion in birds

• By being carried by the wind

• By being buried in soil

• By floating on water

What is one hypothesis for how iguanas reached isolated islands?

• By flying

• By swimming

• By rafting on debris

• By walking on land bridges