NoteTube

Part of CL-01 — Biological Classification

Worked Problems — Data Interpretation

by Notetube Official•148 words•4 views

Problem 1 — Identify the Organism

Question: An organism (X) has the following characteristics:

  • Eukaryotic cells
  • Unicellular
  • No true cell wall — has a flexible proteinaceous covering
  • Can photosynthesize in sunlight
  • Switches to heterotrophic nutrition in darkness
  • Has a flagellum for locomotion

Identify organism X. Which kingdom does it belong to? What is its unique "cell wall" called?

Solution:

  • Eukaryotic + Unicellular → Protista (eliminates Monera)
  • No cell wall with proteinaceous covering → Rules out Diatoms (silica), Dinoflagellates (cellulose plates), fungi (chitin), plants (cellulose)
  • Mixotrophic nutrition (photosynthetic + heterotrophic) + flagellum → Euglenoid
  • Organism X = Euglena (Kingdom Protista — Euglenoids)
  • The flexible covering is called a pellicle (not a cell wall)
  • Key NEET answer: Euglena is mixotrophic because it has both chloroplasts (for photosynthesis) and the ability to ingest food when light is absent

Like these notes? Save your own copy and start studying with NoteTube's AI tools.

Sign up free to clone these notes
Worked Problems — Data Interpretation — Notes | NoteTube | NoteTube