The video explores the concept of bipolar species, organisms found at both poles, and their distribution. It discusses the 2009 marine life survey revealing 235 bipolar species and subsequent genetic studies that question their classification. The video examines gene flow in amphipods and plant dispersal hypotheses, including mountain hopping and long-distance dispersal by shore birds. It highlights the role of climate change in affecting deep-sea currents and the need for further research to understand these species' distribution and genetic makeup.

What is a defining characteristic of bipolar species?

• They are exclusive to the Arctic.

• They are only found in tropical regions.

• They have populations at both poles.

• They migrate only within a single hemisphere.

What did genetic analysis reveal about some bipolar species?

• They are all genetically identical.

• Some are actually multiple distinct species.

• They are only found in the Arctic.

• They have no genetic similarities.

What is one possible explanation for the genetic similarity of bipolar species?

• They evolve very quickly.

• They are constantly crossbreeding.

• They are only found in intermediate regions.

• They evolve slowly, maintaining similar genetics.

How might amphipods travel between poles?

• By flying over the ocean.

• Through an underwater current.

• By walking across land.

• By being carried by birds.

What is the mountain hopping hypothesis?

• Species migrate through ocean currents.

• Species move between suitable mountain habitats.

• Species fly directly between poles.

• Species are carried by wind.

Which bird was identified as a potential disperser of bipolar plants?

• Albatross

• Seagull

• Hudsonian godwit

• Penguin

What impact does climate change have on bipolar species distribution?

• It speeds up ocean currents.

• It slows the formation of deep water currents.

• It increases the number of bipolar species.

• It has no impact on species distribution.