Chapter I

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Across
  1. 4. Symmetry refers to a body that is laid out equally from central axis.
  2. 6. the branch of science concerned with fossil animals and plants.
  3. 9. swimming strokes.
  4. 11. derived from more than one common evolutionary ancestor or ancestral group and therefore not suitable for placing in the same taxon.
  5. 13. refers to the back.
  6. 16. also called as segmentation
  7. 18. it is a tool to emphasizes the functional and evolutionary.
  8. 22. is the study of how decay and tissue disintegration affect fossilization.
  9. 24. electric record of the muscle.
  10. 25. Selection the mechanism of evolution.
  11. 29. an attached appendage has a region farthest.
  12. 31. describes the way in which an animal's body meets the surrounding environment.
  13. 32. also called phylogenetic systematics.
  14. 33. to features with a similar function.
  15. 34. refers to the tail.
  16. 35. the scientist who felt that species were fixed and unchangeable.
  17. 38. to features that simply look alike.
  18. 39. agassiz he studied fossil fishes and was first to recognize evidence of the worldwide ice ages, episodes of glaciation in Earth’s history
Down
  1. 1. Darwin he proposed the conditions for and mechanism of this evolutionary change.
  2. 2. the mid-line of the body.
  3. 3. is the study of relationships among different groups of organisms and their evolutionary development.
  4. 5. descended from a common evolutionary ancestor or ancestral group, but not including all the descendant groups.
  5. 7. sweeping side to side movements of tail.
  6. 8. a tree diagram, especially one showing taxonomic relationships.
  7. 10. is a lineage—all organisms in a lineage plus the ancestor they have in common.
  8. 11. closest to the body.
  9. 12. used by a scientist studying phylogenetic systematics to visualize the groups of organisms being compared, how they are related, and their most common ancestors.
  10. 14. anatomy deals with anatomy and its significance
  11. 15. refers to the belly or front.
  12. 17. is the term that has been coined to recognize the importance of ecological analysis in the examination of a morphological system.
  13. 19. refers to the sides.
  14. 20. or monophylogeny, is a term used to describe a group of organisms that are classified in the same taxon and share a most common recent ancestor.
  15. 21. a body or structure built of repeating or duplicated sections.
  16. 23. a method of placing fossils in a relative sequence to each other
  17. 26. refers to the head.
  18. 27. is restricted to mean the action or property of a part as it works in an organism.
  19. 28. is the process of an animal or plant becoming preserved in a hard, petrified form.
  20. 30. Symmetry it devides the body into two mirrored images.
  21. 36. applies to two or more features that share a common ancestry.
  22. 37. is simply a named group of organisms.