5.4 - Cladistics

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Across
  1. 2. a family of angiosperms.
  2. 4. a diagram which shows groupings based on primitive and shared derived characteristics.
  3. 6. Our closest relatives based on cladistics
  4. 9. 3 words. Used to study the genetic differences between species in cladistics
  5. 10. a group comprised of an ancestral species plus all of the species that have evolved from the organism.
  6. 11. evolution where species from different lineages show similar characteristics because they are subject to similar selection pressures.
Down
  1. 1. A family of angiosperms that had to be reclassified after evidence showed some members were not truly in the right clade
  2. 3. Two words. Using the number of differences in DNA or amino acid sequences to deduce how long ago species split.
  3. 5. evolution where an ancestral species evolves into a number of distinct species due to exposure of different populations to different selection pressures.
  4. 6. constructing a phylogenetic tree based on primitive and shared derived characteristics.
  5. 7. Structures which are similar because of convergent evolution. E.g. bird and bat wings.
  6. 8. Traits that are shared by species with a common ancestor. These traits are similar in structure, but may have very different functions and appearances.