Classification (biology – body parts): Three pairs are mismatched organism→structure; one pair is correctly matched. Identify the correctly matched pair.

Difficulty: Medium

Correct Answer: Hydra : Tentacles

Explanation:

Introduction / Context:Biology classification can invert the usual pattern by asking for the only correct mapping among several incorrect ones. Here, three organism→structure pairs are wrong, while one is right. The task is to find the correctly matched pair.

Given Data / Assumptions:

  • Hydra has tentacles used for food capture and limited locomotion.
  • Plasmodium (malarial parasite) does not use cilia for movement; it exhibits gliding/amoeboid movement depending on life stage.
  • Lizards do not possess flagella; flagella are microscopic appendages (e.g., in certain cells or microorganisms).
  • Cockroach body bears antennae (spelled “antennae”), which are sensory, not listed here correctly due to spelling (“Anternae”).

Concept / Approach:Validate the existence/appropriateness of the named structure for the given organism. Select the sole accurate pair even if another pair contains a misspelling (antennae) because Hydra : Tentacles is unambiguously correct without caveats.

Step-by-Step Solution:

Check Hydra: tentacles → correct.Check Plasmodium: cilia → incorrect.Check Lizard: flagella → incorrect.Check Cockroach: “Anternae” → intended “antennae,” but as written it is incorrect; even conceptually, it is a sensory organ, not mismatched, yet the item seeks the only fully correct mapping.

Verification / Alternative check:Cross-reference basic zoology: Hydra is a cnidarian with tentacles bearing nematocysts; this is standard textbook knowledge.

Why Other Options Are Wrong:

Plasmodium–cilia and lizard–flagella are category errors.Cockroach–“Anternae” contains a spelling error; this set targets the single cleanly correct mapping.

Common Pitfalls:Overlooking that the question asks for the correctly matched pair among several incorrect/malformed ones.

Final Answer:Hydra : Tentacles

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