Classification Systems in Angiosperms — NEET Biology
📚 Practice ConceptLet us also look at classification within angiosperms to understand some of the concerns that influenced the classification systems. The earliest systems of classification used only gross superficial morphological characters such as habit, colour, number and shape of leaves, etc. They were based mainly on vegetative characters or on the androecium structure (system given by Linnaeus). Such systems were artificial; they separated the closely related species since they were based on a few characteristics. Also, the artificial systems gave equal weightage to vegetative and sexual characteristics; this is not acceptable since we know that often the vegetative characters are more easily affected by environment. As against this, natural classification systems developed, which were based on natural affinities among the organisms and consider,
Match the following Classification Systems with their Basis and Key Characteristic/Limitation: Column I (Classification System) A. Artificial System B. Natural System C. Phylogenetic System D. Cytotaxonomy Column II (Basis of Classification) 1. Natural affinities among organisms 2. Evolutionary relationships 3. Gross superficial morphological characters 4. Cytological information Column III (Key Feature/Limitation) i. Gave equal weightage to vegetative and sexual characters ii. Utilizes information like chromosome number and behavior iii. Assumes organisms in same taxa have a common ancestor iv. Considers external and internal features like ultrastructure Which of the following matches is correct?
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