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7c 7d 7e Natural Selection Flashcards

Quiz by Kabreena Attaway

High School
Biology (2017)
Texas Essential Knowledge and Skills (TEKS)

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20 questions
Show answers
  • Q1
    How do we define natural selection?
    The organisms with the best adaptations survive and pass their genes to their offspring
    30s
    BIOL.7e
  • Q2
    What is an adaptation?
    Adaptations are traits that help an organism to survive
    30s
    BIOL.7e
  • Q3
    What is a speciation?
    Two populations of the same species become two different species
    30s
    BIOL.7e
  • Q4
    Why do only some organisms survive to pass on their genes?
    Organisms must COMPETE over limited resources
    30s
    BIOL.7e
  • Q5
    Why would different populations of the same species become different?
    They might become adapted to different environments
    30s
    BIOL.7e
  • Q6
    Does natural selection cause organisms to become adapted?
    No it does not cause adaptations, it just selects the best adaptations
    30s
    BIOL.7e
  • Q7
    What processes cause there to be variations within a species?
    Mutations and recombination cause genetic variations within a species
    30s
    BIOL.7e
  • Q8
    What are some examples of genetic diversity?
    Differences in flower color, beak length, height, and spotting patterns are all examples of genetic diversity
    30s
    BIOL.7e
  • Q9
    What is the carrying capacity of an ecosystem?
    The maximum number of organisms in a population that can survive on the available resources
    30s
    BIOL.7e
  • Q10
    What happens when a population exceeds the carrying capacity?
    The weak and sick organisms do not survive
    30s
    BIOL.7d
  • Q11
    Does natural selection change organisms or populations?
    It changes populations over time
    30s
    BIOL.7c
  • Q12
    Why do populations change over time?
    New and better adaptations are passed to offspring which go on to reproduce themselves
    30s
    BIOL.7c
  • Q13
    What must a species do in order to avoid extinction?
    Every species must continue to reproduce successfully
    30s
    BIOL.7c
  • Q14
    What might happen to a species that could not adapt to a change in the ecosystem?
    It might die out completely and become extinct
    30s
    BIOL.7e
  • Q15
    What do we call a species that is on the brink of extinction?
    Species which are close to extinction are called endangered species
    30s
    BIOL.7e

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