Levels of Classification Flashcards
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Questions and Answers

What is the 1st level of classification?

  • Class
  • Domain (correct)
  • Phylum
  • Kingdom

    • What is the 2nd level of classification?

  • Phylum
  • Family
  • Class
  • Kingdom (correct)

    • What is the 3rd level of classification?

  • Order
  • Family
  • Genus
  • Phylum (correct)

    • What is the 4th level of classification?

    <p>Class</p> Signup and view all the answers

    What is the 5th level of classification?

    <p>Order</p> Signup and view all the answers

    What is the 6th level of classification?

    <p>Family</p> Signup and view all the answers

    What is the 7th level of classification?

    <p>Genus</p> Signup and view all the answers

    What is the last level of classification?

    <p>Species</p> Signup and view all the answers

    What is the classification of humans?

    <p>Homo sapiens</p> Signup and view all the answers

    Domain _____

    <p>Eukarya</p> Signup and view all the answers

    Kingdom ____

    <p>Animalia</p> Signup and view all the answers

    Phylum ________

    <p>Chordata</p> Signup and view all the answers

    Class ______

    <p>Mammalia</p> Signup and view all the answers

    Order _________

    <p>Primates</p> Signup and view all the answers

    Family ________

    <p>Hominidae</p> Signup and view all the answers

    Genus _______

    <p>Homo</p> Signup and view all the answers

    Species _________

    <p>Sapiens</p> Signup and view all the answers

    The two-part naming system is called the ______________

    <p>Binomial Nomenclature</p> Signup and view all the answers

    Genus is _________ Species is _______

    <p>Capitalized, Not</p> Signup and view all the answers

    What is a biological species?

    <p>A group of organisms that can interbreed and produce fertile offspring.</p> Signup and view all the answers

    An organism resulting from the cross between species is called ________

    <p>Hybrid</p> Signup and view all the answers

    What are the 3 domains of life?

    <p>Domain Archae, Domain Bacteria, Domain Eukarya</p> Signup and view all the answers

    Characteristics of Domain Archae?

    <ol> <li>Prokaryotic 2. Most ancient form of life. 3. Live in extreme environments.</li> </ol> Signup and view all the answers

    Characteristics of Domain Bacteria?

    <ol> <li>Prokaryotic 2. Differ from Archae by habitat, structure of cell walls, and RNA structure.</li> </ol> Signup and view all the answers

    Characteristics of Domain Eukarya?

    <ol> <li>Eukaryotic 2. Contains 4 kingdoms: Protista, Plantae, Fungi, Animalia.</li> </ol> Signup and view all the answers

    What is a vestigial structure?

    <p>An evolutionary trait that is evidence of ancestry.</p> Signup and view all the answers

    What are homologous structures?

    <p>Structures similar in form, may differ in function.</p> Signup and view all the answers

    What are analogous structures?

    <p>Similar in function but do not share an evolutionary history.</p> Signup and view all the answers

    Difference between Eukarya and Prokarya?

    <p>Prokarya is single-stranded and does not have a nucleus; Eukarya DNA is double helix and has a nucleus.</p> Signup and view all the answers

    Fungi are _______

    <p>Heterotrophic</p> Signup and view all the answers

    Chinook Salmon belong to what kingdom?

    <p>Animalia</p> Signup and view all the answers

    Coral belong to what kingdom?

    <p>Animalia</p> Signup and view all the answers

    Amoeba belong to what kingdom?

    <p>Protista</p> Signup and view all the answers

    Mold belongs to what kingdom?

    <p>Fungi</p> Signup and view all the answers

    An example of a structure that's homologous with a human arm would be ________

    <p>Bat wing</p> Signup and view all the answers

    What is a cladogram?

    <p>A diagram that shows evolutionary relationships.</p> Signup and view all the answers

    Study Notes

    Levels of Classification

    • Domains serve as the highest rank in the biological classification system, including Eukarya, Bacteria, and Archae.
    • Kingdoms categorize organisms under domains; for instance, Animalia is a kingdom under Eukarya.
    • Phylum groups organisms based on major body plans, such as Chordata for animals with a backbone.
    • Class further subdivides phylum; Mammalia includes all mammals.
    • Orders cluster species based on similar characteristics; Primates include humans and monkeys.
    • Families group closely related organisms, like Hominidae, which includes great apes and humans.
    • Genus consists of closely related species; Homo is the genus for humans.
    • Species is the most specific classification level, defining interbreeding populations; for humans, it is sapiens.

    Human Classification

    • Humans are classified within the following hierarchy:
      • Domain: Eukarya
      • Kingdom: Animalia
      • Phylum: Chordata
      • Class: Mammalia
      • Order: Primates
      • Family: Hominidae
      • Genus: Homo
      • Species: sapiens

    Binomial Nomenclature

    • A two-part naming system that provides a unique name to each species.
    • The genus name is capitalized, while the species name is not.

    Biological Species Definition

    • A group of organisms capable of interbreeding and producing fertile offspring.
    • Example: Horses and donkeys can mate to produce mules, which are sterile.

    Hybrid Organism

    • An organism resulting from crosses between species is termed a hybrid.

    Domains of Life

    • Three domains: Archae, Bacteria, and Eukarya.

    Characteristics of Domain Archae

    • Prokaryotic and the most ancient life form.
    • Often found in extreme environments such as hot springs.
    • Contains one kingdom: Kingdom Archae.

    Characteristics of Domain Bacteria

    • Prokaryotic and distinct from Archae based on habitat, cell wall structure, and RNA.
    • Contains one kingdom: Kingdom Bacteria.

    Characteristics of Domain Eukarya

    • Eukaryotic and includes four kingdoms:
      • Kingdom Protista
      • Kingdom Plantae
      • Kingdom Fungi
      • Kingdom Animalia

    Characteristics of Fungi

    • Can be multicellular or unicellular.
    • Heterotrophic, feeding on the growth of other organisms.
    • Examples include mushrooms and molds.

    Characteristics of Protista

    • Comprises both multicellular and unicellular organisms.
    • Can be heterotrophic or autotrophic, producing their own food.
    • Examples include kelp and amoeba.

    Characteristics of Plantae

    • Exclusively multicellular and autotrophic.
    • Organisms produce their own food via photosynthesis.
    • Examples include trees and flowers.

    Characteristics of Animalia

    • Exclusively multicellular and heterotrophic.
    • Organisms consume other organisms for energy.
    • Examples include tigers and giraffes.

    Vestigial Structures

    • Evolutionary remnants that hint at an organism's ancestry.
    • Examples include whale pelvic bones and the human appendix.

    Homologous Structures

    • Anatomically similar structures that may serve different functions.
    • Example: Vertebrate forelimbs have similar bone structures.

    Analogous Structures

    • Structures that serve similar functions but do not share a common evolutionary origin.
    • Examples include the wings of birds and insects.

    Differences Between Eukarya and Prokarya

    • Prokaryotes are single-celled organisms without a nucleus, whereas eukaryotes have a double-helix DNA structure and contain a nucleus.

    Fungi Classification

    • Fungi belong to the kingdom Fungi and are categorized as heterotrophic organisms.

    Specific Organisms and Their Kingdoms

    • Chinook Salmon: Animalia
    • Coral: Animalia
    • Amoeba: Protista
    • Mold: Fungi

    Homologous Example

    • The bat wing is a homologous structure compared to the human arm.

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    Description

    Test your knowledge of biological classification levels with this set of flashcards. Each card focuses on a specific level from Domain to Family, providing concise definitions for each. Perfect for biology students looking to reinforce their understanding of taxonomy.

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