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NCERT Textbook: Patterns in Life: Diversity and Classification

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FAQs on NCERT Textbook: Patterns in Life: Diversity and Classification

1. What is the significance of biodiversity in ecosystems?
Ans. Biodiversity refers to the variety of life forms in a particular habitat or ecosystem. It is significant because it contributes to ecosystem stability, resilience, and productivity. High biodiversity allows ecosystems to better withstand environmental changes and disturbances, ensuring the survival of various species and the services they provide, such as pollination, nutrient cycling, and habitat provision.
2. How does classification help in the study of living organisms?
Ans. Classification helps in organising living organisms into groups based on shared characteristics, making it easier to study and understand them. It provides a systematic framework for identifying and naming species, facilitating communication among scientists. By classifying organisms, we can also infer evolutionary relationships and track changes in biodiversity over time.
3. What are the main levels of classification in the biological hierarchy?
Ans. The main levels of classification in the biological hierarchy are domain, kingdom, phylum, class, order, family, genus, and species. Each level represents a rank in the classification system, starting from broad categories (like domain) and becoming more specific (like species). This hierarchical structure helps in grouping organisms based on their evolutionary relationships and shared traits.
4. What are the five kingdoms of life as proposed by Whittaker?
Ans. Whittaker proposed a five-kingdom classification system, which includes Monera (prokaryotes), Protista (mostly unicellular eukaryotes), Fungi (multicellular and unicellular organisms that absorb nutrients), Plantae (multicellular photosynthetic organisms), and Animalia (multicellular organisms that typically ingest food). This system reflects fundamental differences in cellular organisation, modes of nutrition, and reproductive methods among the groups.
5. Why is the binomial nomenclature system important in scientific classification?
Ans. The binomial nomenclature system, developed by Carl Linnaeus, is important because it provides a standardised two-part naming system for organisms, consisting of the genus and species names. This eliminates confusion caused by common names, ensuring that each species has a unique and universally accepted scientific name. It facilitates accurate communication and identification in the scientific community.
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