7 - Unit 4, Section 2 - Day 1

Archaebacteria and Eubacteria

Unit 4, Section 2

Multiple Choice

Archaebacteria and eubacteria are:

• Unicellular, prokaryotic, and can be either autotrophic or heterotrophic.

• Unicellular, eukaryotic, and can be either autotrophic or heterotrophic.

• Multicellular, eukaryotic, and can be either autotrophic or heterotrophic.

• Multicellular, prokaryotic, and can be either autotrophic or heterotrophic.

Multiple Select

The singular of bacteria is:

• Bacterium.

• Bacterium.

• Bacterium.

• Bacterium.

• Both kingdoms are:

  • Unicellular

  • Prokaryotic

  • Have both autotrophic and heterotrophic species

• How are they different, then?

Archaebacteria and eubacteria

• Archaebacteria - appeared approximately 3.7 billion years ago

• Eubacteria - appeared approximately 3.5 billion years ago

When Did Bacteria Appear?

• Archaebacteria - are extremophiles (they live in extreme environments

  • Thermophiles - live in hot springs

  • Halophiles - live in extremely salty water

• Eubacteria - live everywhere

Where Do Bacteria Live?

• Archaebacteria - have a variety of shapes

• Eubacteria - have one of three shapes:

  • Cocci

  • Bacilli

  • Spirilla

What Are The Shapes of bacteria?

• Cocci - spherical, or "ball" shaped

• Bacilli - rod shaped

• Spirilla - spiral shaped

Eubacteria shapes

• Bacteria have two ways to move:

  • Cilia (singular cilium) - microscopic "hairs" that cover a bacterium and push them through water

  • Flagellum (plural flagella) - a "whip" connected to a bacterium and propels them

How Do Bacteria Move?

Multiple Choice

A newly-discovered species of bacteria lives in extremely salty water. This species most likely belongs in which kingdom?

• Archaebacteria

• Eubacteria

Match

Match each of the following bacteria classes to their corresponding shapes.

• Cocci

• Bacilli

• Spirilla

Spherical

Rod-Shaped

Spiral

• Spherical

• Rod-Shaped

• Spiral