Unicellular Life Forms: Exploring Protists Archaea and Bacteria

The video explores the world of mostly unicellular organisms: protists, archaea, and bacteria. It highlights the evolutionary differences between eukaryotes and prokaryotes, focusing on the unique characteristics of archaea as extremophiles, the diversity of protists, and the structural features of bacteria. The video also delves into the environments these organisms inhabit and their biological functions.

What is the primary evolutionary difference between eukaryotes and prokaryotes?

• Ability to move

• Ability to photosynthesize

• Presence of a nucleus

• Presence of a cell wall

Why are Archaea considered extremophiles?

• They can photosynthesize

• They can survive without water

• They thrive in extreme environments

• They are resistant to antibiotics

Which of the following is a characteristic of photosynthesizing protists?

• They are related to fungi

• They are known as algae

• They are always multicellular

• They live in dry environments

Where can bacteria be commonly found?

• Only in water

• Only in soil

• In diverse environments, including inside humans

• Only in extreme environments

What is the function of the bacterial capsule?

• To aid in photosynthesis

• To protect against phagocytosis

• To help in movement

• To store nutrients

What is the role of bacterial flagella?

• To aid in movement

• To store DNA

• To perform photosynthesis

• To protect the cell

What is the primary difference between bacterial chromosomes and eukaryotic chromosomes?

• Bacterial chromosomes are linear

• Bacterial chromosomes are circular

• Bacterial chromosomes are single-stranded

• Bacterial chromosomes are membrane-bound

What are plasmids in bacteria?

• Energy storage units

• Main chromosomes

• Extra pieces of DNA

• Protein synthesis sites

What is the function of inclusion bodies in bacteria?

• To aid in movement

• To perform photosynthesis

• To protect against viruses

• To store nutrients

How do bacteria use chemotaxis?

• To form spores

• To reproduce

• To move towards or away from chemicals

• To photosynthesize