Biology

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8thgradeclass
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264806
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Biology
Updated:
2014-03-03 21:53:11
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  1. The process of the biological change by which descendants come to differ from their ancestors.
    Evolution
  2. A group of organisms so simular to one another that they can reproduce and have fertile offspring
    Species
  3. Traces of organisms that existed in the past
    fossils
  4. States that natural disasters such as floods and volcanic eruptions have happened often during Earth;s long history
    Catastrophism
  5. Landforms resulted from slow changes over a long period of time
    Gradualism
  6. the theory that states that the geologic processes that shape Earth are uniform through time
    Uniformitarianism
  7. The difference in the physical traits of an individual from those of other individuals in the group to which it belongs
    variation
  8. A feature that allows an organism to better survive in its environment
    Adaption
  9. The process by which humans change a species by breeding it for certain traits
    Artificial selection
  10. The ability of a trait to be passed down from one generation to the next
    heritability
  11. A mechanism by which individuals that have inherited beneficial adaptions produce more offspring on average that do other individuals
    natural selection
  12. All the individuals of a species that live in an area
    population
  13. A measure of the ability to survive and produce more offspring relative to other members of the population in a given environment
    fitness
  14. The study of the distribution of organisms around the world
    Biogeography
  15. Features that are similar in structure but appear in different organisms and have different functions
    Homologous structures
  16. Structures that perform a similar function but are not similar in orgin
    analogous structures
  17. Remnants of organs or structures that has a function in an early ancestor
    Vestigial structures
  18. The study of fossils or extinct organism
    Paleontology
  19. The combined genetic information of all members of a particular population is called a(an)________.
    gene pool
  20. The ________ of an allele is the number of times that the allele occurs in a gene pool, compared with the number of times other alleles occur.
    frequency
  21. A(an) _______ is a trait controlled by a single gene.
    monogenic
  22. _____ are controlled by two or more genes.
    polygenic
  23. for most genes, a gene pool typically contains _____ (amount) alleles.
    two or more
  24. What type of natural selection takes place when individuals at the upper and lower ends of the curve have highers fitness than individuals in the middle?
    Disruptive Selection
  25. A random change in allele frequency is called ______.
    Genetic drift
  26. In what type of population is genetic drift most likely to occur?
    small populations
  27. What is the formation of a new species called?
    Speciation
  28. What occurs when allele frequencies change as a result of the migration of a small subgroup of a population?
    Directional selection

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