Lichens: A Symbiotic Relationship

The video explores the fascinating world of lichens, highlighting their prevalence and diversity. It delves into the symbiotic relationship between fungi and algae, traditionally thought to be a simple two-part partnership. However, recent research reveals a third fungal partner, reshaping our understanding of lichen symbiosis. This discovery, which began as a small project, has global implications, demonstrating how simple questions can lead to significant scientific breakthroughs.

What is one of the favorite aspects of lichens mentioned in the video?

• Their medicinal properties

• Their constant presence in nature

• Their ability to glow in the dark

• Their use in cooking

What percentage of the Earth's surface is covered by lichens?

• 3%

• 5%

• 7%

• 10%

How fast can some lichens grow in a year?

• Two feet

• Four feet

• Three feet

• One foot

What was the historical assumption about the symbiotic relationship in lichens?

• A union between a fungus and a green algae

• A union between two species of algae

• A union between a fungus and a bacterium

• A union between two species of fungi

What role does the algae play in the lichen symbiosis?

• It provides structure

• It photosynthesizes

• It produces spores

• It decomposes organic matter

What was the new discovery about lichens mentioned in the video?

• They are not actually symbiotic

• They can survive in space

• They have a third symbiotic partner

• They can change colors

What did Native Americans use the edible horse lichen for?

• Making dyes

• Creating medicines

• Making little cliff flowers

• Building shelters

What was the toxic acid found in one type of lichen?

• Acetic acid

• Citric acid

• Volcanic acid

• Sulfuric acid

On how many continents did researchers find the additional symbiotic partner?

• Four

• Seven

• Five

• Six

What is a key takeaway about scientific discoveries mentioned in the video?

• They are always accidental

• They can come from simple questions

• They often come from complex questions

• They always require large teams