Evolution

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Across
  1. 2. A feature in an organism that has lost all of its original function within that species. (our appendix, wisdom teeth, pelvic bone in a snake)
  2. 4. A change in the kind of organism over time, the process by which modern organisms have descended from ancient organisms.
  3. 5. The process by which individuals that are better suited to their environments survive and reproduce most successfully; also called natural selection.
  4. 6. A form of natural selection in which the entire curve moves; occurs when individuals at one end of the distribution curve have higher fitness than individuals in the middle or other end of the curve.
  5. 8. A physical feature that has been inherited by a parent that increases its survival in its environment. (white fur in snow rabbits, giraffe’s long neck, shape of a bill on a bird)
  6. 10. The ability of an organism to survive and reproduce in its environment.
  7. 12. A very sharp decrease in population size caused by an environmental or human event. The decrease could be temporary. (forest fire, flood, deforestation, hunting)
  8. 13. The process by which individuals that are better suited to their environment survive and reproduce more successfully, also called survival of the fittest.
  9. 15. A change in the DNA sequence that affects genetic information.
  10. 17. Scientist who first recognized that organisms change over time. Incorrect assumption that organisms can pass on (inherited) traits acquired during their lifetime.
  11. 18. The process by which unrelated organisms independently evolve similarities when adapting to similar environments.
  12. 21. The process by which two species evolve in response to changes in each other.
  13. 22. Different characteristics, traits, or genetic makeup between individuals in the same species or population.
  14. 23. A form of natural selection in which a single curve splits in two; occurs when individuals at the upper and lower ends of the distribution curve have higher fitness than those in the middle of the curve.
  15. 25. Random changes in the allele frequencies that occur in small populations
  16. 29. Process by which unrelated organisms independently evolve similarities when adapting to similar environments.
  17. 30. The separation of a species or population so that they can not interbreed and produce fertile offspring.
  18. 31. Information about past life; including the structure of organisms, what they ate, what ate them, in what environment they lived, and the order in which they lived.
  19. 34. Formation of a new species
  20. 35. Combined genetic information of all the members of a particular population
  21. 36. Form of reproductive isolation in which two populations are separated physically by geographic barriers such as rivers, mountains, or stretches of water.
  22. 37. Change in allele frequencies as a result of the migration of a small subgroup of the population.
  23. 38. A group of similar organisms that can breed and produce fertile offspring.
  24. 39. Physical features in different species that have the same function but were NOT inherited from a common ancestor. (Bat wings, bird wings, insect wings)
  25. 40. A technique in which scientists calculate the age of a sample based on the amount of remaining radioactive isotopes it contains
Down
  1. 1. Selection by humans for breeding of useful traits from the natural variation among different organisms.
  2. 3. Evolutionary type in which organisms of a related species, with a common ancestor, develop differences in response to their environment, forming a new, distinct species.
  3. 7. Transfer of genetic material from one population to another through movement. (Migrations, pollen release, and dispersal)
  4. 9. The method of determining the age of a fossil by comparing its placement with that of the fossils in other layers of rock.
  5. 11. The same group of embryonic cells develops in the same order and in similar patterns to produce similar tissue in vertebrates.
  6. 14. A form of natural selection by which the center of the curve remains in its current position; occurs when individuals in the middle of the curve have higher fitness than individuals on either end
  7. 16. Scientist who collected evidence to support the theory that organisms change over time; the Theory of Evolution
  8. 19. A group of individuals of the same species that live in the same area.
  9. 20. Disappearance of a species from all parts of its geographical range.
  10. 24. study of how and why plants, animals, and other living things are distributed across the Earth, both in the present day and over geological time.
  11. 26. Number of times the allele occurs in a gene pool compared with the number of times other alleles for the same gene occur.
  12. 27. Structures that have different mature forms in different organisms but develop from the same embryonic tissue.
  13. 28. A change in an organism’s action or habits to enhance its survival in its environment. (migration, hibernation, opposum playing dead)
  14. 32. Adaptation that allows an organism to blend in with its environment to avoid detection by a predator, enhancing survival.
  15. 33. Preserved remains or evidence of an ancient organism.