Question

Match List I with List II
List I
A. Decapoda
B. Arachnida
C. Insecta
D. Diplopoda
List II
I. Tick, mite, spider, scorpion
II. Crayfish, shripm, lobster
III. Millipedes
IV. Bedbug, mosquito, grasshopper
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-I, C-III, D-IV
• D. A-I, B-II, C-IV, D-III

Hint:

Remember leg counts to solve arthropod classifications: - Decapoda $\rightarrow$ 10 legs (crustaceans) - Arachnida $\rightarrow$ 8 legs - Insecta $\rightarrow$ 6 legs - Diplopoda $\rightarrow$ double-legged segments (millipedes).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Arthropods are divided into distinct classes and orders based on segment tagmosis, the number of jointed legs, and respiratory and excretory systems.
Matching these taxonomic groups to their representative organisms is a fundamental skill in invertebrate zoology.

Step 2: Detailed Explanation:
Let us match each group in List I with its representative organisms in List II:
- A. Decapoda: This is an order of crustaceans characterized by having ten jointed thoracic legs, including II. Crayfish, shripm (shrimp), lobster.
- B. Arachnida: This class of terrestrial arthropods is characterized by having eight jointed walking legs and a fused cephalothorax, including I. Tick, mite, spider, scorpion.
- C. Insecta: This class is characterized by a body divided into three parts (head, thorax, abdomen) and possessing six jointed legs, including IV. Bedbug, mosquito, grasshopper.
- D. Diplopoda: This class is defined by having two pairs of jointed legs on most body segments, commonly known as III. Millipedes.
This gives the match: A-II, B-I, C-IV, D-III.

Step 3: Final Answer
The correct option is (B).