The skeleton of the sponges is in the form of variously shaped needle like structure called:
Correct answer: D. Spicules
- A. Stipules
- B. Brails
- C. Spines
- D. Spicules
Explanation
Based on the explanations provided, the correct answer to the question is option D) Spicules. The skeleton of sponges is made up of small, needle-like structures called spicules. Spicules are composed of either calcium carbonate or silica and provide structural support to the sponge's body. They come in various shapes and sizes, depending on the species of 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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