Understanding Species Distribution

The video explores how species spread across the globe, focusing on disjunct distribution. It discusses human influence, range fragmentation, and biological adaptations. Examples include the Eurasian pygmy shrew, screaming hairy armadillo, marsupials, mangrove trees, killifish, and iguanas. The video highlights how these distributions help us understand evolutionary history and climate change.

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

• Convergent evolution

• Disjunct distribution

• Sympatric speciation

• Parallel evolution

How did the Eurasian pygmy shrew likely arrive in Ireland?

• By swimming across the sea

• Through a land bridge

• By hitching a ride on boats

• By flying

What is range fragmentation?

• The merging of different species

• The splitting of a species' habitat into separate areas

• The extinction of a species

• The adaptation of a species to a new environment

Which era's climate changes contributed to the range fragmentation of the screaming hairy armadillo?

• Triassic

• Jurassic

• Pleistocene

• Cretaceous

How did marsupials likely spread to Australia?

• By flying

• By human intervention

• By swimming

• Through Gondwana

What adaptation helps mangrove seeds travel long distances?

• Being sticky

• Being colorful

• Being buoyant

• Being lightweight

How can killifish eggs end up in new habitats?

• By floating on water currents

• By being eaten and excreted by birds

• By being carried by the wind

• By attaching to larger fish

What is a possible way iguanas reached Caribbean islands?

• By walking on land bridges

• By flying

• By swimming

• By rafting on debris

What natural event could create rafts that transport animals like iguanas?

• Earthquakes

• Hurricanes

• Volcanic eruptions

• Tsunamis

What can studying disjunct distributions help us understand?

• The diet of animals

• The migration patterns of humans

• The genetic mutations in species

• The evolutionary history and climate changes