Cell wall is absent in - DASH

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Cell wall is absent in

Mycoplasma

Nostoc

Aspergillus

Funaria.

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Explanation 1. Introduction Mycoplasma are the simplest and smallest free-living prokaryotes, classified under Kingdom Monera. A distinctive feature of Mycoplasma is the absence of a rigid cell wall, which sets them apart from other bacteria and organisms. 2. Cell Wall Absence in Mycoplasma Unlike most prokaryotes that possess a cell wall made up of peptidoglycan, Mycoplasma cells are bounded only by a plasma membrane. This unique characteristic gives them the ability to change shape and makes them exceptionally flexible. The absence of the cell wall also imparts resistance to certain antibiotics that typically target bacterial cell wall synthesis. 3. Other Organisms Mentioned • Nostoc: A cyanobacterium (blue-green algae) that retains a cell wall containing peptidoglycans. • Aspergillus: A genus of fungi with a chitin-rich cell wall. • Funaria: A moss (bryophyte) possessing a cellulose-based cell wall. 4. Conclusion Thus, Mycoplasma stands out among these organisms because it completely lacks a cell wall, relying solely on its plasma membrane as the outer boundary of the cell.

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