Question

Which one of the following groups of animals are correctly matched with the mentioned characteristic feature?

• A. Sponges, Sea anemone, Sea cucumber - Bilateral symmetry
• B. Centipede, Prawn, Sea urchin - Jointed appendages
• C. Scorpion, Spider, Cockroach - Jointed appendages
• D. Cockroach, Locust, Flatworm - Metameric segmentation

Answer 1

The correct option is C Scorpion, Spider, Cockroach - Jointed appendages

1. Bilaterally symmetry is the type of symmetry in which the body is divided vertically into two equal halves. Sponges are asymmetric whereas sea anemone and sea cucumber have radial symmetry.
   
2. Arthropods are animals that have jointed appendages. Centipedes and prawns are arthropods but sea urchins are echinoderms.
3. Scorpions, spiders and cockroaches are arthropods and thus have jointed appendages.
   
4. Metameric segmentation is the repetition of organs and tissues at intervals along the body of an animal, thus dividing the body into a linear series of similar parts or segments (metameres). It is found in cockroaches and locusts, but not in Taenia.

Therefore, the correct answer is option C.