8 - Natural Selection Crossword

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Across
  1. 6. Any difference between individuals of the same species
  2. 8. the branch of biology and medicine concerned with the study of embryos and their development
  3. 9. A classification grouping that consists of a number of similar, closely related species
  4. 13. Process by which cells from two different parents unite to produce the first cell of a new organism.
  5. 15. using DNA sequences and/or chemical compounds of species to determine relatedness
  6. 18. a random error in gene replication that leads to a change
  7. 20. a physical or chemical event that occurs within the body of an organism and enables survival
  8. 23. When two separate species begin to share analogous (comparable) traits because of shared environment pressures or shared demands.
  9. 26. The gradual change in a species over time
  10. 27. the formation of new and distinct species in the course of evolution
  11. 30. group or level of organization into which organisms are classified
  12. 31. Process by which two species evolve in response to changes in each other
  13. 32. Ability of an animal to look like another more harmful animal
  14. 33. Bodies within the nucleus made in DNA and proteins called the histones
  15. 34. Fossils that provide patterns of evolutionary change from the early ancestors to modern life forms
  16. 35. inherited characteristic that increases an organism's chance of survival
  17. 36. Structures in different species that are similar because of common ancestry
  18. 38. A reproductive process that involves only one parent and produces offspring that are identical to the parent.
  19. 39. A species or organism that is most suited to survive in a certain type of environment
Down
  1. 1. Body parts that share a common function, but not structure
  2. 2. A structure that is present in an organism but no longer serves its original purpose
  3. 3. the evolution of populations of pathogenic bacteria that antibiotics are unable to kill
  4. 4. Any color, pattern, shape, or behavior that enables an animal to blend in with its surroundings
  5. 5. an inherited behavior that helps an organism survive
  6. 7. when some species are no longer effected by interventions such as antibiotics or pesticides
  7. 10. a physical feature of an organism's body having a specific function that contributes to the survival of the organism
  8. 11. Organisms born with the best adaptations survive and pass on their traits to offspring. Organisms without these adaptations die and do not reproduce. Over time, the population changes as more organisms inherit the adaptation
  9. 12. A natural process resulting in the evolution of organisms best adapted to the environment
  10. 14. Natural features that separate populations of a species and interbreeding more difficult or impossible
  11. 16. An organism in the earliest stage of development
  12. 17. A preserved remnant or impression of an organism that lived in the past.
  13. 19. A form of asexual reproduction in which a new cell grows out of the body of a parent
  14. 20. the state of existing before or previous to something else
  15. 21. The top rock layer and its fossils is the youngest and the bottom is the oldest
  16. 22. Combined genetic information of all the members of a particular population
  17. 24. Human interventions in helping to produce desired traits in domesticated animals
  18. 25. Classification system in which each species is assigned a two-part scientific name
  19. 28. A term that typically describes a species that no longer has any known living individuals
  20. 29. A group of organisms that are closely related and can mate to produce fertile offspring
  21. 37. A characteristic that an organism can pass on to its offspring through its genes