NEET Biology question
Which one of the following groups of three animals is correctly matched with their one characteristic morphological feature?
| Animals | Morphological feature | |---|---| | (a) Scorpion, spider, cockroach | Ventral solid central nervous system | | (b) Cockroach, locust, *Taenia* | Metameric segmentation | | (c) Liver fluke, sea anemone, sea cucumber | Bilateral symmetry | | (d) Centipede, prawn, sea urchin | Jointed appendages |
Solution
Scorpion, spider and cockroach are all arthropods possessing a ventral, solid, ganglionated nerve cord, making option (a) correct. *Taenia* (a flatworm) shows proglottid-based strobilation, not true metameric segmentation like cockroach and locust, invalidating (b). Sea anemone (radially
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