Euglena

Definition

Euglena is a genus of single-celled flagellate eukaryotes characterized by their ability to perform photosynthesis and heterotrophy. They are commonly found in freshwater environments.

5 Must Know Facts For Your Next Test

1. Euglena possesses a unique organelle called the eyespot, or stigma, which helps it detect light for photosynthesis.
2. It has a flexible outer membrane known as a pellicle, which allows it to change shape while moving.
3. Euglena reproduces primarily through binary fission, an asexual process.
4. They have chloroplasts containing chlorophyll a and b, similar to those in plants, enabling them to perform photosynthesis.
5. In the absence of light, Euglena can ingest food particles through phagocytosis.

Review Questions

• What function does the eyespot in Euglena serve?
• How does Euglena reproduce?
• What type of environments are Euglena commonly found in?

Related terms

Paramecium:

A genus of unicellular ciliates commonly studied as a representative of the ciliate group.

Flagellum: A whip-like structure that enables many protozoa, bacteria, and spermatozoa to swim.

Chloroplast: An organelle found in plant cells that conducts photosynthesis.