Systematics of Living Organisms
Maharashtra Board · Class 11 · Biology
Flashcards for Systematics of Living Organisms — Maharashtra Board Class 11 Biology. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is systematics? Who defined it and in which year?
Answer
Systematics is the study of kinds and diversity of organisms and their comparative and evolutionary relationships. It was defined by G. Simpson in 1961.
What is taxonomy? What is the origin of this term and who introduced it?
Answer
Taxonomy means classification following certain rules or principles. It comes from Greek words 'taxis' (arrangement) and 'nomos' (law or rule). It was introduced by A. P. de Candolle, a Swiss Botanist…
Compare artificial, natural, and phylogenetic classification systems with examples.
Answer
Artificial: Based on few easily observable, non-evolutionary features (e.g., Linnaeus system). Natural: Based on objectively significant features rather than convenience (e.g., Bentham and Hooker's sy…
What are the three domains of life proposed by Carl Woese? What are their key differences?
Answer
Archaea, Bacteria, and Eukarya. Bacteria and Archaea have prokaryotic cells, while Eukarya have eukaryotic cells. All three have unique ribosomal RNA (rRNA). Archaea survive in extreme conditions, and…
What is chemotaxonomy? Give an example.
Answer
Chemotaxonomy is the method of biological classification based on similarities and differences in structure of certain chemical compounds found among organisms. Example: Archaea cell wall is without p…
What is DNA barcoding and what are its applications?
Answer
DNA barcoding is a method for species identification based on DNA sequences from tiny tissue samples. Applications include: protection of endangered species, preservation of natural resources, pest co…
List the taxonomic hierarchy from highest to lowest category.
Answer
Kingdom → Division/Phylum → Class → Order → Family → Genus → Species. These are compulsory categories. Additional facultative categories like sub-order, sub-family can be used as needed.
Define species as a taxonomic unit. What is the modern view of species?
Answer
Species is the lowest natural taxonomic unit, denoted by Latin binomial. It's a group of organisms that can interbreed under natural conditions to produce fertile offspring. Modern taxonomy recognizes…
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