Evolution and Natural selection

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Across
  1. 3. the process whereby organisms better adapted to their environment tend to survive and produce more offspring.
  2. 4. occurs when the sperm from the male parent fertilizes an egg from the female parent, producing an offspring that is genetically different from both parents
  3. 6. Ecological speciation is the process by which new species form as a consequence of divergent natural selection between contrasting ecological environments.
  4. 8. special body parts that help a plant or animal survive in an environment.
  5. 10. any cell or organism that possesses a clearly defined nucleus.
  6. 11. variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.
  7. 13. the introduction of genetic material (by interbreeding) from one population of a species to another,
  8. 14. a single-celled organism that lacks a nucleus, and other membrane-bound organelles.
  9. 15. organisms best adjusted to their environment are the most successful in surviving and reproducing
  10. 17. the action or process of adapting or being adapted.
  11. 18. the continued existence of organisms which are best adapted to their environment, with the extinction of others, as a concept in the Darwinian theory of evolution.
  12. 19. he frequencies of the different phenotypes of a particular trait within in a population.
Down
  1. 1. a subset of AMR, that applies specifically to bacteria that become resistant to antibiotics.
  2. 2. any cell or organism that possesses a clearly defined nucleus.
  3. 5. something an animal does usually in response to some type of external stimulus in order to survive.
  4. 7. reduction in the intensity of light or other radiation as it passes through a medium or object, due to absorption, reflection, and scattering.
  5. 9. is when a species goes through an event that suddenly and significantly reduces its population.
  6. 12. the reduced genetic diversity which results when a population is descended from a small number of colonizing ancestors.
  7. 16. the formation of new and distinct species in the course of evolution.