Match the points under Column A with those under Column B.

Question

Match the points under Column A with those under Column B.

Column-A:

i. Hexapoda,

ii. Crustacea,

iii. Myriapoda,

iv. Chelicerata.

Column-B: a. Daphnia, b. Mosquito, c. Limulus, d. Julus.

1. A. i-b, ii-a, iii-d, iv-c (Correct answer)
2. B. i-d, ii-c, iii-b, iv-a
3. C. i-a, ii-b, iii-c, iv-d
4. D. i-b, ii-c, iii-a, iv-d

Correct Answer

Option A — i-b, ii-a, iii-d, iv-c

Detailed Solution & Explanation

The correct answer is i-b, ii-a, iii-d, iv-c.

Key Points

• Hexapoda – Mosquito (b); Crustacea – Daphnia (a).
• Myriapoda – Julus (d); Chelicerata – Limulus (c, the horseshoe crab).

Additional Information

• The four arthropod classes to keep straight by leg count: Hexapoda (insects, 3 pairs), Crustacea (usually 5 pairs), Myriapoda (many pairs) and Chelicerata (4 pairs, with chelicerae instead of antennae).
• Type examples: mosquito and cockroach (Hexapoda), *Daphnia* the water flea and prawns (Crustacea), *Julus* the millipede and *Scolopendra* the centipede (Myriapoda), *Limulus* the horseshoe crab and spiders (Chelicerata).
• Arthropoda is the largest animal phylum, distinguished by a chitinous exoskeleton, jointed appendages and moulting.
• *Limulus* is often called a living fossil, having changed little over hundreds of millions of years.