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Which of the following does not have an ...

Which of the following does not have an elaborate mechanism of spore dispersal ?

A

Funaria

B

Polytrichum

C

Sphagnum

D

Riccia

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question "Which of the following does not have an elaborate mechanism of spore dispersal?", we will analyze each of the given options: Finaria, Polytrichum, Sphagnum, and Rissia. ### Step-by-Step Solution: 1. **Identify the Groups**: - Finaria, Polytrichum, and Sphagnum are all types of mosses. - Rissia is a type of liverwort. **Hint**: Group the options based on their classification (mosses vs liverworts). 2. **Understand the Sporophyte Structure**: - In mosses (Finaria, Polytrichum, Sphagnum), the sporophyte is more developed and contains a capsule where spores are produced in large numbers after meiosis. - In liverworts (Rissia), the sporophyte is less developed, and the capsule containing spores is embedded in the gametophyte. The number of spores produced is also fewer compared to mosses. **Hint**: Compare the sporophyte structures of mosses and liverworts. 3. **Examine Spore Dispersal Mechanisms**: - Mosses have an elaborate mechanism for spore dispersal. They utilize various methods such as wind, water, and even animals to disperse their spores effectively. - In contrast, liverworts like Rissia have a less developed mechanism for spore dispersal. The spores are fewer in number and the dispersal is not as effective or elaborate. **Hint**: Look for the effectiveness and complexity of spore dispersal in each group. 4. **Conclusion**: - Since Rissia (the liverwort) has a less elaborate mechanism for spore dispersal compared to the mosses (Finaria, Polytrichum, Sphagnum), the correct answer to the question is Rissia. **Hint**: Identify which option stands out due to its simpler structure and mechanism. ### Final Answer: Rissia does not have an elaborate mechanism of spore dispersal.
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