Question Video: Describing the Main Features of 𝐸𝑢𝑔𝑙𝑒𝑛𝑎 | Nagwa Question Video: Describing the Main Features of 𝐸𝑢𝑔𝑙𝑒𝑛𝑎 | Nagwa

Question Video: Describing the Main Features of πΈπ‘’π‘”π‘™π‘’π‘›π‘Ž

Which of the following best describes πΈπ‘’π‘”π‘™π‘’π‘›π‘Ž? [A] Green, moves by changing body shape, able to engulf microorganisms [B] Jellylike, moves using a flagellum, able to engulf microorganisms [C] Green, moves using a flagellum, able to engulf microorganisms [D] Green, moves using a flagellum, unable to engulf microorganisms [E] Jellylike, moves using a flagellum, unable to engulf microorganisms

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Video Transcript

Which of the following best describes Euglena? (A) Green, moves by changing body shape, able to engulf microorganisms. (B) Jellylike, moves using a flagellum, able to engulf microorganisms. (C) Green, moves using a flagellum, able to engulf microorganisms. (D) Green, moves using a flagellum, unable to engulf microorganisms. Or (E) jellylike, moves using a flagellum, unable to engulf microorganisms.

Euglena is a unicellular, or single-celled, organism. It is an especially interesting organism as in spite of being single celled, it is able to photosynthesize much like a plant would. Remember, photosynthesis is the process by which some organisms are able to use light energy and simple inorganic molecules to produce their own food in the form of sugars.

Euglena cells can carry out photosynthesis thanks to organelles they contain called chloroplasts. The photosynthetic pigments within these chloroplasts, such as chlorophyll, often make Euglena cells appear green in color. This means that we can narrow our answer choices down to (A), (C), or (D).

Most species of Euglena are also able to obtain nutrition by engulfing food particles and even smaller microorganisms. This means that they have a backup method of obtaining nutrients if light levels are low. With this information, we can eliminate answer choice (D), which suggests that Euglena cells are unable to engulf microorganisms.

Euglena cells have several adaptations that allow them to access light efficiently to maximize the amount of food they make through photosynthesis. For example, Euglena cells are able to move fairly quickly using whiplike tails called flagella. A single flagella is called a flagellum. They allow the Euglena cell to quickly move in the direction of light when they sense it, maximizing the efficiency of photosynthesis. This means that we have found the correct answer to this question.

The answer choice that provides the best description of Euglena is (C): green, moves using a flagellum, able to engulf microorganisms.

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