Which one of the following is wrong for fungi ?
- They are eukaryotic
- All fungi possess a purely cellulosic cell wall
- They are heterotrophic
- They are both unicellular and multicellular
The Correct Option is B
Solution and Explanation
Answer: Option 2: All fungi possess a purely cellulosic cell wall
Explanation:
This statement is incorrect because fungi do not have a purely cellulosic cell wall.
- Fungal cell walls are primarily made up of chitin, not cellulose.
- Chitin is a tough, nitrogen-containing polysaccharide that also occurs in the exoskeletons of arthropods.
The other statements are correct:
- They are eukaryotic — Fungi have membrane-bound organelles.
- They are heterotrophic — Fungi obtain nutrients by absorption.
- They can be unicellular (e.g., yeast) or multicellular (e.g., molds and mushrooms).
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Concepts Used:
Biological Classification
The process of grouping living organisms into categories is called biological classification. The most modern 5-kingdom classification was put ahead by an eminent scientist R.H.Whittaker. The five-kingdom classification is based on the criteria like cell structure, mode of nutrition, body form, and reproduction. One of the most important characteristics of this system is that it follows the evolutionary sequence of living organisms. The organisms are classified into distinct taxa or levels like Kingdom, Phylum, Division, Class, Order, Family, Genus, and Species. The 5 kingdoms are as follows:
