REFRESH YOUR KNOWLEDGE!

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