Edexcel GCSE Biology

Classification

Edexcel GCSE Biology revision on Classification. Aligned to the Pearson Edexcel GCSE Biology 1BI0 specification. This bank has 5 practice questions on this topic.

Sample questions (3 of 5)

  1. Question 1

    Which taxonomic rank is the most specific level used to identify an individual organism within the binomial system?

    • A) Family
    • B) Species
    • C) Genus
    • D) Order
    Show answer

    Answer: Species

    In the binomial system, organisms are named using their genus and species. The species level is the most specific rank, consisting of individuals that can breed and produce fertile offspring.

  2. Question 2

    What is the primary reason for the development of the three-domain system of classification?

    • A) Advances in DNA analysis
    • B) Changes in fossil evidence
    • C) Study of internal anatomy
    • D) Improved light microscopy
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    Answer: Advances in DNA analysis

    While older systems relied on observable physical characteristics, modern classification uses genetic analysis. This revealed that Archaea are distinct from Bacteria, necessitating the addition of a domain level above kingdom.

  3. Question 3

    Which group of organisms is characterised by having cells with a distinct nucleus and membrane-bound organelles?

    • A) Prokaryotes
    • B) Eukaryotes
    • C) Archaebacteria
    • D) Monera
    Show answer

    Answer: Eukaryotes

    Prokaryotes, such as bacteria, lack a membrane-bound nucleus and organelles. Eukaryotes include plants, animals, fungi, and protists, all of which store DNA within a protective nuclear envelope.

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