REFRESH YOUR KNOWLEDGE!

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Across
  1. 2. The plane which separates the anterior and posterior portions.
  2. 4. He was well known for opposing Darwin’s theory and did not believe in the transmutation of species.
  3. 7. The hypothesis which states that chordates originated from echinoderms.
  4. 8. It is restricted to mean the action or property of a part as it works in an organism.
  5. 10. Refers to the retention of some larval characteristics in the adult.
  6. 12. It pertains to an organism’s anatomical structure that is coincidentally highly suited to a new environment and enhances its probability to survive.
  7. 14. They are sometimes called the ascidian tadpole.
  8. 17. This tail is prim.arily an extension of the chordate locomotor apparatus
  9. 18. Specifying general regions of an embryo is termed as?
  10. 26. He referred to the vertebrate evolution as the “vertebrate story.”
  11. 27. Tunicates belong to this group.
  12. 28. It is a slender rod that develops from the mesoderm in all chordates.
  13. 30. In truly segmented animals, it sequentially subdivides the hydrostatic skeleton into a series of internal compartments.
  14. 32. Both sexes occur in the same individual.
  15. 34. One of the few modern sciences that addresses the natural unity of both structure and evolution.
  16. 36. A state wherein traits are inherited from the most recent common ancestor.
  17. 38. Groups that include the ancestor and all of the descendant groups.
  18. 39. The kind of systematics that classifies species based on the most obvious similarities between them.
  19. 40. A biological blueprint upon which an organism was built.
Down
  1. 1. They possess some of the five characteristics that define a chordate.
  2. 3. The mucus produces a mid-ventral food-groove called?
  3. 5. Groups that include a common ancestor and some, but not all of its descendants.
  4. 6. He recognized that organisms are complex functional wholes.
  5. 8. Slits first evolved and aided primarily in what?
  6. 9. The Mississipian and Pennsylvanian periods are also known as?
  7. 11. It is the oldest likely cephalochordate recovered from Canada.
  8. 13. Refers to how the part is used in the environment during the course of the organism’s life history.
  9. 15. Chordates evolved within what?
  10. 16. The period when the first vertebrates appeared.
  11. 19. The nerve tube typically form by a distinctive embryonic process called?
  12. 20. He proposed that chordates originated from echinoderms.
  13. 21. Sea squirts belong to the subgroup of Urochordata called?
  14. 22. The pharyngeal slits are also called?
  15. 23. Huxley was associated to this animal for his advocacy to Darwin's theory of evolution.
  16. 24. An example of this is the wings of a bat and the arms of a human that are composed of the same bones namely radius, ulna and humerus.
  17. 25. He proposed a progressive change in species along an ascending scale, from the lowest on one end to the most complex and perfect.
  18. 29. He was known for his vertebral theory of the skull.
  19. 31. He wrote The Evolution of Man, in which he depicted the human phylogeny.
  20. 33. He wrote the book in which the theory of evolution by natural selection was based from.
  21. 35. It recognizes similar features that look alike, but was not inherited from a common ancestor.
  22. 37. A taxonomic group within the hemichordates usually in their sessile form.