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