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Consider the following characters : Mari...

Consider the following characters : Marine habitat , Statocyst, Cnidoblast, Colloblast cells, Comb plates, tentacles
How many characters are present in all adult ctenophores without any exception?

A

Four

B

Five

C

Three

D

Six

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the characters present in all adult ctenophores, we will analyze each character listed and determine which ones are universally present in adult ctenophores. ### Step-by-Step Solution: 1. **Marine Habitat**: - Ctenophores are exclusively marine organisms. They are found in oceanic environments and do not inhabit freshwater or terrestrial habitats. - **Conclusion**: This character is present in all adult ctenophores. 2. **Statocyst**: - Statocysts are balance organs that help in orientation. While many ctenophores possess statocysts, it is not universally present in all species. - **Conclusion**: This character is not present in all adult ctenophores. 3. **Cnidoblast**: - Cnidoblasts (or cnidocytes) are stinging cells found in cnidarians (like jellyfish and corals) but are not found in ctenophores. Instead, ctenophores have coloblasts for capturing prey. - **Conclusion**: This character is not present in ctenophores. 4. **Colloblast Cells**: - Colloblasts are specialized cells unique to ctenophores. They are adhesive cells that help in capturing prey. - **Conclusion**: This character is present in all adult ctenophores. 5. **Comb Plates**: - Comb plates (or ctenes) are rows of cilia used for locomotion and are a defining feature of ctenophores. - **Conclusion**: This character is present in all adult ctenophores. 6. **Tentacles**: - Adult ctenophores possess tentacles, which are used for capturing prey. - **Conclusion**: This character is present in all adult ctenophores. ### Summary of Characters Present in All Adult Ctenophores: - Marine Habitat - Colloblast Cells - Comb Plates - Tentacles ### Final Answer: There are **4 characters** present in all adult ctenophores without any exception. ---
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