Question

Match List I with List II

Choose the correct answer from the options given below:

• A. A - I, B - III, C - II, D - IV
• B. A - III, B - I, C - IV, D - II
• C. A - I, B - III, C - IV, D - II
• D. A - II, B - IV, C - I, D - III

Hint:

To easily remember weed categories:
- Floating: Lemna, Pistia, Azolla
- Submerged: Hydrilla, Vallisneria, Ceratophyllum
- Emergent/Marginal: Typha, Scirpus, Nymphaea

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Aquatic weeds in culture ponds and natural water bodies are classified into distinct ecological categories based on their habit, growth form, and spatial position in the water column.

Step 2: Detailed Explanation:
Let us match the aquatic weed categories with their respective representative genera:
- Marginal weed: These grow along the shorelines or shallow margins, with roots anchored in the soil and shoots extending partially above the water. Scirpus (bulrush) is a classic example (A - III).
- Submerged weed: These complete their entire lifecycle fully underwater, rooted or unrooted. Vallisneria (tape grass) is a classic rooted submerged weed (B - I).
- Floating weed: These float freely on the water surface. Lemna (duckweed) is a prominent free-floating weed (C - IV).
- Water hyacinth: This is a notorious invasive weed scientifically classified under the genus Eichhornia (D - II).

Step 3: Final Answer:
The correct matching is A - III, B - I, C - IV, D - II, which corresponds to option (B).