Objective
Compare the structures and functions of the following single-
celled organisms:
EuglenaAmoeba
ParameciumVolvox
Essential Question: What are the characteristics of the following
single-celled organisms?
EuglenaAmoeba
ParameciumVolvox
• Environment: fresh and salt water• Movement: flagella (tail-like)• Food:
– Heterotrophic- engulfs full cell and absorb them.– Autotrophic- make their own food using chlorophyll.
• Reproduction: asexual• Additional Organelle:
– Eye spot- senses light and guides Euglena in its direction
Euglena
Euglena
• Environment: Fresh and salt water• Movement: Cytoplasmic Streaming
– Changing shape • Food: heterotrophic
– They surround their prey and engulf it with a Pseudopodium- (false foot)
• Reproduction: asexual• Additional Information: Changes shape
Amoeba
Amoeba Eating Paramecium
• Environment: Fresh water • Movement: Cilia (hair-like)
– Bend and straighten helping propel organism through water.
• Food: Heterotrophic– Uses cilia to sweep the food into the cell.
• Reproduction: sexual and asexual• Additional Info: Most complex and specialized
Paramecium
Paramecium
• Environment: freshwater, unicellular organism called ciliates living in a colony together
• Movement: Each cell in the colony has 2 flagella – Eyespots: sense and guide towards
light• Food:
– Heterotrophic• Eat algae
– Autotrophic • makes its food through photosynthesis
• Reproduction: asexual and sexual – daughter colonies (offspring) mature
and the Volvox bursts open to release them.
Volvox
Volvox
Euglena Amoeba Paramecium Volvox
Environment Fresh and salt water Fresh and salt water Fresh water Fresh water
Movement Flagella(tail-like)
Cytoplasmic streaming(changing shape)
Cilia (hair-like) Flagella (tail-like)
Food Autotrophic and Heterotrophic
Heterotrophic Heterotrophic Autotrophic and Heterotrophic
Additional Information
Eye spot(light sensitive)
Pseudopod (False foot)
Most specialized and complex
Lives in colonies, Eyespots
Diagram
Quiz
Be sure you have these in your notes!!!
Which single-celled organisms moves by flagellum?
A. EuglenaB. Amoeba
C. ParameciumD. Volvox
A. Euglena
Which single-celled organism moves by cilia or hairlike
projections?
A. EuglenaB. Amoeba
C. ParameciumD. Volvox
C. Paramecium
Which single-celled organism uses pseudopods to surround
and engulf their food?
A. EuglenaB. Amoeba
C. ParameciumD. Volvox
B. Amoeba
Which single-celled organism is a colony of ciliates of which some contain chlorophyll?
A. EuglenaB. Amoeba
C. ParameciumD. Volvox
D. Volvox
Which single-celled organism has a unique feature of an eye
spot?
A. EuglenaB. Amoeba
C. ParameciumD. Volvox
A. Euglena
Which single-celled organism moves by cytoplasmic
streaming?
A. EuglenaB. Amoeba
C. ParameciumD. Volvox
B. Amoeba
Which types of single-celled organisms may contain
chlorophyll?
A. Euglena and AmoebaB. Amoeba and ParameciumC. Paramecium and Volvox
D. Euglena and Volvox
D. Euglena and Volvox
Which organism appears in the photos?
• paramecium
Look at the picture. Be able to answer the questions on the
following slide!
What organelle engulfs food?A. cytoplasm
B. pseudopodsC. vacuolesD. nucleus
What organelle digests the food?A. cytoplasmB. pseudopodsC. food vacuole
D. nucleus
B. pseudopods
C. food vacuoles
Name the organelles located at A. and B.
A.
B.
A. Is the nucleus
B. Is the cytoplasm