Unicellular Life Part 2: Archaea and Protists

The video discusses archaea and protists, highlighting the unique characteristics of archaea as extremophiles thriving in extreme environments. It explains the endosymbiotic theory, suggesting eukaryotic life evolved from prokaryotes. Protists are introduced as diverse, mostly unicellular eukaryotes, with various types like euglenids, diatoms, and amoebas, each exhibiting unique features. The video explores how these organisms provide insights into the evolution of multicellular life.

What unique characteristic allows archaea to thrive in extreme environments?

• Presence of peptidoglycan in their cell walls

• Ability to photosynthesize

• Unique cell wall components and membrane lipids

• Dependence on low salinity

Which theory explains the evolution of eukaryotic cells from prokaryotes?

• Germ Theory

• Theory of Evolution

• Cell Theory

• Endosymbiotic Theory

What term is used to describe eukaryotic organisms that are not plants, animals, or fungi?

• Archaea

• Viruses

• Bacteria

• Protists

Which type of protist is known for having a light detector to move towards light sources?

• Diatoms

• Ciliates

• Dinoflagellates

• Euglenids

What is the primary composition of the cell wall in diatoms?

• Silicon dioxide

• Peptidoglycan

• Cellulose

• Chitin

Which protist group is characterized by having armor-like plates made of cellulose?

• Radiolarians

• Euglenids

• Dinoflagellates

• Amoebas

What feature do amoebas use to move and capture food?

• Tentacles

• Flagella

• Cilia

• Pseudopods