Natural Selection

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Across
  1. 3. loss of genetic variation that occurs when a new population is established by a very small number of individuals from a larger population
  2. 6. the type of structures which no longer serve a function.
  3. 10. an alteration in the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA
  4. 11. rapid bursts of change followed by long periods of no change
  5. 12. preserved remains, or traces of remains, of ancient organisms
  6. 14. a diagram that shows relationships and common ancestry
  7. 15. idea that live species are descendants of ancestral day ones also defined more narrowly as a change is the genetic composition of population form generation
Down
  1. 1. the type of speciation that occurs when there are no physical barriers preventing any members of a species from mating with another, and all members are in close proximity to one another
  2. 2. disruptive selection selects AGAINST the ____________.
  3. 4. survival of the_______.
  4. 5. the branch of biology that deals with the form of living organisms, and with relationships between their structures.
  5. 7. change in the frequency of an existing gene variant in a population due to random sampling of organisms.
  6. 8. the type of speciation that involved a legit physical geographical barrier
  7. 9. an alteration in the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA
  8. 13. Charles