104 Unit 2 Review

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Across
  1. 5. The type of speciation that results from a geographic barrier.
  2. 6. When evolutionary forces result in similar structures in distantly related organisms.
  3. 7. The plant vascular tissue that moves water and minerals.
  4. 10. A split in a branch of a phylogenetic tree.
  5. 12. This group of organisms is more closely related to animals than to plants (though we tend to group them with plants more often).
  6. 14. The waxy covering of plants and arthropods that reduces water loss.
  7. 19. The molecules that plants use to absorb light.
  8. 22. ____________ extinct is when the
  9. 23. Almost all animals have _________ digestion.
  10. 24. The accidental inclusion of extra chromosomes during meiosis.
  11. 27. Chordates have various external _________, like tails and limbs.
  12. 28. Chordates have a dorsal supporting rod, called a _________.
  13. 29. Humans, our ancestors, and related species.
  14. 31. The _____________ species concept states that individuals that reproduce only with each other are the same species.
  15. 32. The male gametophyte that protects sperm and keeps it from drying out.
  16. 33. The era before recent times, during which there were several periods of glaciation.
  17. 34. The opposite of extinct.
  18. 35. is present but no longer performing its function in the ecosystem.
  19. 37. The product of photosynthesis that fluctuates in the atmosphere over time.
  20. 38. A shared derived trait.
  21. 39. The vertebrae and abdominal muscles of humans are examples of this feature of animal body plans.
Down
  1. 1. The evolutionary history of relationships among organisms.
  2. 2. The group of animals that have backbones.
  3. 3. The part of the flowering plants that surrounds the seed and aids in dispersal.
  4. 4. The group of plants known as the "naked seed" plants.
  5. 8. The ____________ species concept states that individuals that look alike are the same species.
  6. 9. The ________ environment of Earth plays a large role in the evolution of life.
  7. 11. A major advantage that humans have (walking on two legs).
  8. 13. The type of monkeys that have prehensile tails.
  9. 15. A major branch of the tree of life, along with archaea and eukarya.
  10. 16. The __________ extinction is called the "sixth extinction"--the one humans are creating.
  11. 17. The first hominin to leave Africa.
  12. 18. ___________ traits are traits that result from convergent evolution.
  13. 19. The simplest explanation is the likely explanation.
  14. 20. The name for the clades of eukaryotes that are not plants, animals, or fungi.
  15. 21. The type of symmetry when the animal can be cut into two equal halves along a single plane.
  16. 25. The plant vascular tissue that moves the products of photosynthesis.
  17. 26. The group of plants known as the flowering plants.
  18. 30. The ______-finned fishes were the first to move onto land.
  19. 36. The type of speciation that occurs in the absence of a physical barrier.