A comparative biological study analyzes three distinct fungal organisms: unicellular yeast (*Saccharomyces*), filamentous bread mould (*Rhizopus*), and a macrofungal mushroom (*Agaricus*). Which of the following statements correctly identifies a fundamental structural and metabolic feature common to all three organisms that distinguishes Kingdom Fungi from plants and bacteria?
- They possess cell walls composed primarily of chitin and absorb soluble nutrients following extracellular enzymatic digestion.Answer
- BThey ingest solid, insoluble organic particles holozoically through phagocytosis into food vacuoles for internal breakdown.
- CThey construct cell walls composed of peptidoglycan polymers reinforced with cellulose microfibrils to resist osmotic pressure.
- DThey possess reduced chloroplasts capable of light-independent carbon fixation while relying on saprophytism during periods of darkness.
Answer
They possess cell walls composed primarily of chitin and absorb soluble nutrients following extracellular enzymatic digestion.
The correct answer highlights the two unifying traits of Kingdom Fungi across diverse morphological forms (yeasts, moulds, and mushrooms): a cell wall constructed of chitin and an absorptive mode of nutrition mediated by extracellular enzyme secretion.
Step-by-Step Solution
Key Concept
Structural and Nutritional Characteristics of Kingdom Fungi
Estimated Time:1m 30s