Classification & Evolution

    Cards (16)

    • List the 8 Taxonomic levels:
      1. Domain
      2. Kingdom
      3. Phylum
      4. Class
      5. Order
      6. Family
      7. Genus
      8. Species
    • What does the phylum in the taxonomic levels use to group organisms?
      Body plan
    • As you go down the 8 taxonomic levels....
      • the differences are smaller
      • becomes more specific
      • requires detailed description
    • Why do we use the binomial naming system?
      • common names do not worktranslation of languages may give a different name
      • Latin is a universal languagebecomes a universal name, avoids confusion
    • List all the types of variation:
      • discontinuous
      • continuous
      • interspecific
      • intraspecific
    • What causes variation:
      • Genetic
      • Environmental
    • Explain why bats and birds, despite not being closely related, have both evolved wings.
      • similar lifestyle
      • similar selection pressure
      • wings are advantageous for their survival - its alleles are passed to the next generation
    • Why do the vast majority of bird species have not evolved the ability to echolocated?
      • they do not need it as they are active during the day
      • reduced visibility is not an issue
    • Explain how scientists are able to estimate the age of extinct organisms.
      • the study of fossils
      • the deeper the fossil in the ground, the older the organism
    • Why is just comparing the lengths of different species as an observation not valid?

      • age needs to be taken into account
      • a large sample should be used ∵ its better to find an average
      • the comparison of absolute lengths cannot be made
    • What is the role of segments in organisms?
      allows flexibility
    • State three biological molecules that can be used to provide evidence that species have evolved.
      • DNA
      • rRNA
      • Cytochrome C
    • Modern classification reflects phylogeny
    • Define Heterotrophic:
      An organism that consumes food made by autotrophics
    • Define Autotrophics:
      An organism that makes their own food
    • State the biological molecule *commonly* used to determine evolutionary relationships?
      rRNA
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