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Natural Selection， Artificial Selection

Quiz by Zhao

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26 questions
Show answers
  • Q1
    Which of the following best describes natural selection?
    A mechanism that drives evolution through differential survival and reproduction.
    A random process with no connection to fitness.
    A process where the environment decides the traits of organisms.
    A process in which individuals with unfavorable traits are more likely to survive.
    30s
  • Q2
    What is the result of competition for limited resources in natural selection?
    All individuals survive equally.
    The extinction of all species in the population.
    A random distribution of traits in the population.
    Differential survival with those better adapted being more likely to survive.
    30s
  • Q3
    Which of the following is an example of phenotypic variation?
    Differences in the genetic code of individuals in a population.
    Variations in traits such as color or size that can affect survival and reproduction.
    The random placement of alleles during reproduction.
    The ability of an individual to mutate.
    30s
  • Q4
    How does natural selection affect a population over time?
    It leads to a change in the genetic makeup of the population over generations.
    It drives the population toward uniformity.
    It eliminates genetic diversity.
    It has no effect on population genetics.
    30s
  • Q5
    What is the primary measure of evolutionary fitness?
    Survival rate of individuals.
    Reproductive success of individuals.
    How quickly an organism can adapt to a new environment.
    The ability to live in various environments.
    30s
  • Q6
    What factor most directly affects the rate and direction of evolution?
    The age of the population.
    Human intervention.
    Stability of biotic and abiotic environments.
    Availability of food.
    30s
  • Q7
    What is an example of artificial selection?
    Random selection of individuals to reproduce.
    Selection by humans to increase desirable traits in plants or animals.
    Natural adaptation of species to a new environment.
    Selection of traits by nature that improve survival.
    30s
  • Q8
    What is convergent evolution?
    When a species evolves to meet specific environmental demands.
    The evolution of species in the same environment.
    The process by which species evolve independently in different environments.
    When similar selective pressures result in similar adaptations in different species.
    30s
  • Q9
    What is the role of genetic variation in natural selection?
    It is irrelevant to natural selection.
    It only affects populations in stable environments.
    It provides the raw material for evolution by natural selection.
    It ensures that all organisms are perfectly adapted to their environment.
    30s
  • Q10
    What does natural selection act on?
    The environment of the species.
    The reproductive behavior of organisms.
    The genotype of individuals.
    The phenotypic variations in individuals.
    30s
  • Q11
    Which of the following statements is true regarding natural selection?
    It leads to differential survival and reproduction based on phenotypic traits.
    It guarantees survival for all individuals in a population.
    It increases genetic diversity in all cases.
    It only operates in a stable environment.
    30s
  • Q12
    What is a major cause of natural selection?
    The ability to mimic other species.
    The random occurrence of mutations.
    The physical size of an organism.
    Competition for limited resources.
    30s
  • Q13
    How do abiotic and biotic factors affect evolutionary change?
    They make populations identical over time.
    They apply selective pressures, influencing the direction and rate of evolution.
    They only affect the gene flow within a population.
    They have no effect on evolution.
    30s
  • Q14
    Which of the following is an example of a phenotype?
    The mutations in the DNA of an organism.
    The alleles of an organism.
    The observable traits of an organism, such as color or shape.
    The genetic code of an organism.
    30s
  • Q15
    Which of the following is true about fitness in the context of natural selection?
    Fitness only refers to the ability to survive.
    Fitness is about the ability to migrate to new environments.
    Fitness refers to the ability to reproduce and pass on genes.
    Fitness is the ability to resist diseases only.
    30s

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