Match List I with List II
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Choose the correct answer from the options given below:
Show Hint
To remember the dispersal mechanisms:
- Physalis (bladder cherry) is famous for its papery, Balloon-like inflated calyx.
- Thistle always disperses using a classic Pappus (parachute) structure.
Step 1: Understanding the Concept:
Weeds have evolved diverse seed dispersal mechanisms (anemochory) to spread their seeds over long distances using the wind.
These adaptations include specialized hairs, parachute-like structures, and inflated calyces. Detailed Explanation:
Let us match each wind dispersal structure with its corresponding weed species:
- A. Pappus/parachute: A pappus is a modified calyx consisting of fine, bristly hairs that act like a parachute, allowing seeds to float on the wind.
Canada thistle (Cirsium arvense) seeds are equipped with a feathery pappus that aids wind dispersal.
This matches with III. Canada thistle.
- B. Comose: Comose seeds have a tuft of long, silky hairs attached to one or both ends.
Wild sugarcane (Saccharum spontaneum) produces seeds with a tuft of fine, comose hairs that allow them to blow away on the wind.
This matches with IV. Saccharum sp.
- C. Persistence/feathery calyx: Some species have a persistent, feathery calyx or style that remains attached to the seed to aid wind dispersal.
Anemone species are well-known for their persistent, feathery structures that catch the wind.
This matches with I. Anemone sp.
- D. Balloon: In some species, the calyx inflates around the fruit, forming a light, hollow balloon that can be easily blown along the ground.
Wild gooseberry (Physalis minima) features an inflated, persistent calyx that encloses the berry like a balloon.
This matches with II. Physalis minima.
Combining these pairs yields the sequence:
\[ \text{A - III}, \ \text{B - IV}, \ \text{C - I}, \ \text{D - II} \]
This matches Option (A). Step 2: Final Answer:
The correct matching sequence is A - III, B - IV, C - I, D - II.
