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Questions and Answers
Who proposed the Five Kingdom classification system?
Which of the following kingdoms is not included in the Five Kingdom classification?
Which organisms having cell walls were once included in Plantae but now excluded?
What term is no longer appropriate for cyanobacteria?
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Which system of classification used gross superficial morphological characters?
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What did early systems of classification primarily rely on?
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Why are artificial systems of classification considered inadequate?
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Which type of classification system is based on natural affinities among organisms?
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Study Notes
Introduction to Plant Kingdom
- Kingdom Plantae, also known as the plant kingdom, is a broad classification of living organisms.
- Whittaker's Five Kingdom classification system includes Monera, Protista, Fungi, Animalia, and Plantae.
Evolution of Understanding of Plant Kingdom
- Our understanding of the plant kingdom has changed over time.
- Fungi, Monera, and Protista with cell walls have been excluded from Plantae in recent classifications.
- Cyanobacteria, previously referred to as blue-green algae, are no longer considered "algae".
Classification within Plantae
- Algae, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms are classified under Plantae.
- Angiosperms are further classified into subgroups based on natural affinities among organisms.
Early Classification Systems
- Early classification systems used superficial morphological characters such as habit, color, number, and shape of leaves.
- These systems were artificial, separating closely related species based on a few characteristics.
- Systems developed by Linnaeus were based on vegetative characters or androecium structure.
Limitations of Early Classification Systems
- Early systems gave equal weightage to vegetative and sexual characteristics, which is not acceptable.
- Vegetative characters are easily affected by environmental factors.
Natural Classification Systems
- Natural classification systems are based on natural affinities among organisms.
- These systems consider multiple characteristics, not just vegetative or sexual traits.
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Description
Learn about the classification of living organisms and the Plant Kingdom, including the Five Kingdom classification and the characteristics of Plantae.
