Place these taxonomic classification systems in chronological order of their development:
a) Whittaker's five-kingdom system
b) Linnaeus's artificial system
c) Bentham and Hooker's natural system
d) Engler and Prantl's phylogenetic system
e) APG system for flowering plants

Correct option is A

The correct answer is (a) b-c-d-a-e

Explanation:

• Linnaeus's artificial system (1735/1753) was based on superficial morphological characters like the number of stamens.
• Bentham and Hooker's natural system (1862–1883) considered natural affinities and internal features like anatomy and embryology.
• Engler and Prantl's phylogenetic system (1887–1915) was one of the first to classify plants based on evolutionary relationships.
• Whittaker's five-kingdom system (1969) categorized life into Monera, Protista, Fungi, Plantae, and Animalia based on cell structure and nutrition.
• APG (Angiosperm Phylogeny Group) system (first in 1998, latest 2016) is the most modern molecular-based system for flowering plants.

• Taxonomy has evolved from morphology-based (Linnaeus) to evolutionary-based (Phylogenetic) to DNA-based (APG) systems.
• Modern taxonomy increasingly relies on cladistics and molecular data.

• Incorrect because Whittaker (1969) is much later than Linnaeus (1753).

• Incorrect because Linnaeus predates both Whittaker and Bentham.

• Incorrect because Bentham and Hooker's natural system preceded Engler and Prantl's phylogenetic system.