ZOOLOGY VOCABULARY CHAPTER 7

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Across
  1. 1. the study of the naming of organisms in the fashion that reflects their evolutionary relationships
  2. 3. without a balanced arrangement of similar parts on either side of a a point or axis
  3. 6. the development of a head with an accumulation of nervous tissue into a brain
  4. 7. the study of the classification and phylogeny of organisms
  5. 9. the description of species and the grouping of organisms to reflect evolutionary relationships
  6. 11. a group of organisms descended from a single ancestor
  7. 13. a group of organisms that are genetically related
  8. 14. the outer embryological tissue layer
  9. 16. a form of symmetry in which only the midsagittal plane divides an organism into mirror images
  10. 18. analogous resemblances between animals that result from animals adapting under similar evolutionary pressures
  11. 19. an assemblage of organisms that includes multiple evolutionary lineages
  12. 20. a form of symmetry in which any plane passing through the oral-aboral axis divides an organism into mirror images
Down
  1. 2. without a body cavity
  2. 4. a description of the evolutionary history of a group of taxa, usually depicted by tree diagrams
  3. 5. a group that includes some, but not all, members of a lineage
  4. 8. the innermost embryological tissue layer
  5. 10. any animal attribute that has a genetic basis and that can be measured
  6. 12. a balanced arrangement of similar parts on either side of a common point or axis
  7. 15. animals whose body parts are organized into layers that are derived embryologically from two tissue layers
  8. 17. animals whos e body parts are organized into layers that are derived embryologically form three tissue layers