Ghosts of Evolution

The video explores the evolutionary history of the ginkgo biloba tree and the avocado, highlighting their relationships with extinct animals. It introduces the concept of evolutionary anachronisms, where plants and animals have traits that are no longer selected for due to the extinction of their ecological partners. The video discusses how human agriculture has influenced plant survival, allowing species like the avocado to persist despite their natural dispersers being extinct. It concludes with a call to appreciate the role humans play in preserving these evolutionary oddities.

What makes the ginkgo biloba tree an evolutionary oddity?

• It grows only in tropical regions.

• It existed before flowering plants.

• It produces sweet-smelling seeds.

• It has colorful flowers.

Why is the avocado's large seed considered an evolutionary anachronism?

• It grows in cold climates.

• It is too small for any animal to eat.

• It is poisonous to all animals.

• It relies on extinct animals for dispersal.

Which extinct animal was responsible for dispersing avocado seeds?

• Dodo bird

• Giant ground sloth

• Saber-toothed tiger

• Woolly mammoth

What is an example of an evolutionary anachronism in humans?

• Opposable thumbs

• Facial hair

• Bipedalism

• Color vision

How have humans helped preserve plants with evolutionary anachronisms?

• By changing their genetic makeup

• By creating new species

• By planting orchards

• By introducing new predators