Which of the following organisms contains Chlorophyll in its cells?

Step 1: Analyze the question The question asks which organism has chlorophyll, the green pigment used in photosynthesis, in its cells.

Step 2: Concept Chlorophyll is found in chloroplasts. These are present in plants, algae and some protists. Animals and most animal-like protists do not have chlorophyll because they feed heterotrophically (they take in ready-made food).

Step 3: Examine each option

• A. Caterpillar: an insect larva that feeds on leaves. It is an animal with no chlorophyll.
• B. Paramecium: a ciliated, animal-like protozoan that feeds heterotrophically on bacteria. It has no chlorophyll.
• C. Euglena: a unicellular protist that has chloroplasts containing chlorophyll. It photosynthesizes in the light, so it is autotrophic. It can also feed heterotrophically when light is absent, so it is described as having both plant and animal features.
• D. Grasshopper: an insect and an animal, so it has no chlorophyll.

Step 4: Answer The correct option is C. Euglena.

Tip: Remember "Euglena = green protist." It is the classic example of an organism that sits between plants and animals. It has chlorophyll like a plant but can move with a flagellum like an animal. Whenever WAEC asks about chlorophyll in a list of mostly animals, look for Euglena, Spirogyra, or Chlamydomonas.