In five-kingdom system, the main basis of classification is
Correct answer: A. Mode of nutrition
- A. Mode of nutrition
- B. Mode of reproduction
- C. Complexity of behavior
- D. Number of chromosomes
Explanation
In Whittaker's five-kingdom system of classification, the main basis is mode of nutrition, which distinguishes autotrophs (plants), heterotrophs by ingestion (animals), heterotrophs by absorption (fungi), and mixed types (protists, monerans). Other factors like mode of reproduction, complexity of behavior, and number of chromosomes were not used as the primary basis, since they are either variable, not universal, or less significant at the kingdom level.
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About Biodiversity and Variety of Life
Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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