Diversity in Living Organisms: 20 flashcards

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1. What is biodiversity?

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The variety of living organisms on Earth, from microscopic bacteria to giant whales.

2. What is classification?

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The process of grouping organisms into hierarchical groups based on shared features.

3. What is taxonomy?

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The science of naming and classifying organisms.

4. List the main taxonomic levels from broadest to narrowest.

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Kingdom, Phylum, Class, Order, Family, Genus, Species.

5. What is a species?

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The basic unit of classification; members can interbreed and produce fertile offspring.

6. What is binomial nomenclature?

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A two-part Latin naming system: genus (capitalised) + species (lowercase), e.g., Homo sapiens.

7. Who formalised binomial nomenclature?

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Carolus Linnaeus.

8. Who proposed the five-kingdom system and when?

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R.H. Whittaker in 1969.

9. Name the five kingdoms.

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Monera, Protista, Fungi, Plantae, Animalia.

10. What are Monera?

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Prokaryotic organisms like bacteria; they lack a true nucleus.

11. What are Protista?

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Single-celled eukaryotes like Amoeba and Paramecium.

12. What are Fungi?

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Heterotrophs with chitin cell walls that store glycogen; e.g., moulds, mushrooms, yeasts.

13. What are Plantae?

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Autotrophic organisms with cellulose cell walls and large central vacuoles.

14. What are Animalia?

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Heterotrophic organisms lacking cell walls; they grow to a definite size.

15. Why are fungi not plants?

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Fungi lack chlorophyll, have chitin cell walls, and store glycogen instead of starch.

16. What is the largest phylum in Animalia?

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Arthropoda.

17. What are Bryophytes called?

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Amphibians of the plant kingdom.

18. How do gymnosperms differ from angiosperms?

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Gymnosperms have naked seeds; angiosperms have seeds enclosed in fruit.

19. What is a notochord?

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A flexible rod present at some stage of life in chordates.

20. What is the key difference between Monera and Protista?

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Monera are prokaryotic (no true nucleus); Protista are eukaryotic (true nucleus).

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