Question

Choose the option that mentions only arthropods?

• A. Snail, prawn, crab
• B. Scorpion, spider, prawn
• C. Leech, butterfly, silverfish
• D. Cockroach, grasshopper, liver fluke

Answer 1

Answer: (B)

Scorpion, spider, prawn

Phylum Arthropoda is characterized by the following features-

1. Their body is triploblastic, coelomate, bilaterally symmetrical and metamerically segmented.

2. They possess a chitinous exoskeleton that undergoes periodic moulting.

3. Each segment has a pair of jointed appendages (legs) used for locomotion, feeding or sensory purpose.

For example, silverfish, scorpions, spiders, prawns, butterflies, cockroaches, grasshopper, crab etc.

The other option mentioned are from different phyla: Snail belongs to the phylum Mollusca, leech belongs to the phylum Annelida and liver fluke belongs to the phylum Platyhelminthes.

Thus, the correct answer is option B.