Archaea

Mr. Andersen discusses Archaea bacteria, initially thought to inhabit only extreme environments like Yellowstone's hot pots and the Great Salt Lake. However, they are found everywhere, including oceans and human guts. Archaea are more closely related to eukaryotes than bacteria, despite being prokaryotic. They lack a nucleus and organelles but have a unique cell wall structure. Methanogens, a type of Archaea, produce methane in environments like cow guts. Archaea are versatile, living in diverse environments, and share more similarities with eukaryotes than previously thought.

Where were Archaea bacteria first discovered?

• In the ocean

• In the hot pots of Yellowstone Park

• In the Amazon rainforest

• In the Sahara Desert

What percentage of life in the ocean was found to be Archaea bacteria?

• 20%

• 30%

• 10%

• 5%

According to the phylogenetic tree, which group are humans more closely related to?

• Plants

• Fungi

• Archaea

• Bacteria

What is a key feature of Archaea bacteria's cell wall?

• Lacks a cell wall

• Made of peptidoglycan

• Contains cellulose

• Composed of an S-layer

What is a characteristic of Archaea bacteria?

• They are multicellular

• They are prokaryotic

• They have organelles

• They have a nucleus

What do methanogens produce as a byproduct?

• Methane

• Oxygen

• Hydrogen

• Nitrogen

Where can methanogens be commonly found?

• In the gut of a cow

• In the atmosphere

• In the ocean

• In volcanic rocks