Which of the following statements is without exception for sponges?
Correct answer: B. They have high regenerative power
- A. They all have calcareous spicules
- B. They have high regenerative power
- C. They are found only in marine water
- D. They are all radially symmetrical
Explanation
Sponges may have calcareous or siliceous spicules. All sponges are not marine, some are freshwater living. Sponges may be asymmetrical or bilaterally symmetrical, besides being radially symmetrical. So, these characters are with exception. The character without exception is the regenerative power of sponges. All sponges have a good power of regeneration.They can egrow any part of the body lost or cut off. Small fragments can grow into a complete sponge.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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