Question

Which of the following groups of 3 animals each, is correctly matched with their one characteristic morphological feature?

• A. Animals : Centipede, Prawn, Sea urchin
  Morphological features: Jointed legs
• B. Animals : Cockroach, Locust, Flatworm
  Morphological features: Segmented body
• C. Animals : Scorpion, Spider, cockroach
  Morphological features: Jointed legs
• D. Animals : Liverfluke, Sea anemone, Sea cucumber
  Morphological features: Bilateral Symmetry

Answer 1

The correct option is C Animals : Scorpion, Spider, cockroach

Morphological features: Jointed legs
The animals cockroach, spider and scorpion are members of the phylum Arthropoda.

The following are the characteristics of Arthropods:

• They are invertebrates.
• They have a hard exoskeleton.
• They have segmented bodies.
• They are characterized by the presence of jointed legs.
• They are bilaterally symmetrical.
• They have an open circulatory system.
• For A - Sea urchin is an echinoderm (no jointed legs).
• For B - The body of flatworms is not segmented.
• For D - Sea anemones are radially symmetrical.

Thus, the correct option is C.