Moss protonema can be differentiated from filamentous alga ina)Long rhizoidsb)Coenocytic naturec)Oblique septad)Absence of chloroplastsCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

The protonema of moss differs from filamentous alga in having brown walled cells separated  by oblique septa both algae filaments and protonema contain chloroplast

Answer

Answer

Introduction:
Moss protonema and filamentous algae are two different types of plant structures. Moss protonema refers to the early stage of moss development, while filamentous algae are a diverse group of algae that have filamentous structures. These two structures can be differentiated based on certain characteristics.

Explanation:
The correct answer to the given question is option 'C' - Oblique septa. Moss protonema can be differentiated from filamentous algae based on the presence of oblique septa.

Here is a detailed explanation of each option:

1. Long rhizoids:
Rhizoids are root-like structures that anchor the plant to the substrate. While moss protonema does have long rhizoids, filamentous algae also possess rhizoids. Therefore, the presence of long rhizoids cannot be used as a distinguishing factor between the two structures.

2. Coenocytic nature:
Coenocytic nature refers to the absence of cell walls between cells, resulting in a multinucleate cytoplasm. Filamentous algae commonly exhibit a coenocytic nature, where the filaments are composed of continuous cytoplasm without cell walls. In contrast, moss protonema consists of individual cells with cell walls. Therefore, the coenocytic nature is not a characteristic unique to moss protonema.

3. Oblique septa:
The presence of oblique septa is a characteristic feature of moss protonema. Oblique septa are slanted or diagonal cell walls that divide the cells of moss protonema. These septa provide structural support and aid in the transport of nutrients and water between cells. Filamentous algae, on the other hand, lack oblique septa as they possess a coenocytic nature without any internal cell walls. Therefore, the presence of oblique septa is a distinguishing feature of moss protonema.

4. Absence of chloroplasts:
The absence of chloroplasts is not a characteristic that differentiates moss protonema from filamentous algae. Both structures contain chloroplasts, which are responsible for photosynthesis and the production of energy.

Conclusion:
Moss protonema can be differentiated from filamentous algae by the presence of oblique septa. These slanted cell walls are unique to moss protonema and are absent in filamentous algae. Other characteristics mentioned in the options, such as long rhizoids, coenocytic nature, and absence of chloroplasts, are not exclusive to moss protonema and are shared by filamentous algae as well.

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