NTA Abhyas NEET2020BotanyAnimal KingdomPractice
Which one of the following groups of three animals each are correctly matched with their characteristic morphological feature?
Options
- AAnimals Morphological feature Centipede, Prawn, Sea urchin Joined appendages
- BAnimals Morphological feature Scorpion, Spider, Cockroach Ventral solid central nervous system
- CAnimals Morphological feature Cockroach, Locust , Taenia Metameric segmentation
- DAnimals Morphological feature Liver fluke, Sea anemone,Sea cucumber Bilateral symmetry
Correct answer
B. Animals Morphological feature Scorpion, Spider, Cockroach Ventral solid central nervous system
Step-by-step solution
Scorpion, Spider and Cockroaches are Arthropods and thus are Non-chordates. All non-chordates show presence of ventral nerve cord. In option (B), Centipede and prawn show jointed appendages as these are Arthropods but Sea urchin is an Echinoderm. In option (C), Cockroaches and Locust are Arthropods and hence body is divisible into head, thorax and abdomen while Taenia are flat worms and belong to Phylum Platyhelminthes and thus segmentation is absent. In option (D), Liver fluke shows bilateral symmetry. Sea anemone