Question

Match List I with List II
List I:
A. Grub
B. Maggot
C. Caterpillar
D. Desert locust
List II:
I. Apodus
II. Thoracic legs
III. International pest
IV. Thoracic and abdominal legs
Choose the correct answer from the options given below:

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

Hint:

Larval types are classified by leg development: apodous (maggots, no legs), oligopodous (grubs, thoracic legs only), and polypodous (caterpillars, both thoracic and abdominal legs).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Immature stages (larvae) of holometabolous insects and nymphal stages of hemimetabolous insects exhibit morphological and behavioral differences.
These differences are used for classification and in pest management.

Step 2: Detailed Explanation:
Let us match each organism or larval type with its structural or ecological characteristics:
1. Grub (A): Grubs are oligopodous larvae typical of the order Coleoptera (beetles).
They possess three pairs of well-developed thoracic legs (II) but completely lack abdominal prolegs.
Therefore, A matches with II.
2. Maggot (B): Maggots are the larvae of Diptera (true flies), characterized by an apodous (I) body that completely lacks legs.
They also lack a distinct sclerotized head capsule (acephalous).
Therefore, B matches with I.
3. Caterpillar (C): Caterpillars are polypodous larvae typical of the order Lepidoptera (butterflies and moths).
They possess three pairs of segmented thoracic legs and abdominal prolegs (IV) (typically 2 to 5 pairs) equipped with tiny hooks (crochets).
Therefore, C matches with IV.
4. Desert locust (D): The Desert locust (Schistocerca gregaria) is a migratory, swarming orthopteran.
Because of its ability to migrate across national borders and cause widespread agricultural damage, it is classified as an international pest (III).
Therefore, D matches with III.

Step 3: Final Answer:
Combining these biological characteristics yields the sequence: A-II, B-I, C-IV, D-III.