Chitinous Setae are the locomotary organs of annelids which are present on?
Correct answer: D. Parapodia
- A. Cell wall
- B. Prostomium
- C. Nucleolus
- D. Parapodia
Explanation
Option D is correct. Chitinous setae are the locomotory organs of annelids. Setae, are small, bristle-like structures that are made of chitin. They are found on the parapodia, which are fleshy appendages that project from the sides of the annelid's body. The setae help the annelid to move by providing traction. Here are some additional details about setae and parapodia: Structure: Setae are small, bristle-like structures that are made of chitin. They are typically arranged in two rows on each side of the parapodium. Function: Setae help the annelid to move by providing traction. When the annelid contracts its muscles, the setae grip the substrate and help to pull the annelid forward. Location: Setae are found on the parapodia, which are fleshy appendages that project from the sides of the annelid's body.
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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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