full transcript

From the Ted Talk by Nigel Hughes: Is this the most successful animal ever?

Unscramble the Blue Letters

For almost all of Earth’s hsrotiy before the rise of the trilobites, life had mostly consisted of microscopic marine omsnairgs. But then, scientists think an increase in oxygen allowed multicellular lifeforms to extract more energy from their food and perform more complex fcntionus. This then enabled the rise of carnivores, which in turn spurred a productive arms race, resulting in what’s known as the Cambrian explosion. Within about 20 million years, life had branched out to include most of the animal groups we know tdoay. toilebrits were an important part of this surge.

Open Cloze

For almost all of Earth’s _______ before the rise of the trilobites, life had mostly consisted of microscopic marine _________. But then, scientists think an increase in oxygen allowed multicellular lifeforms to extract more energy from their food and perform more complex _________. This then enabled the rise of carnivores, which in turn spurred a productive arms race, resulting in what’s known as the Cambrian explosion. Within about 20 million years, life had branched out to include most of the animal groups we know _____. __________ were an important part of this surge.

Solution

  1. trilobites
  2. organisms
  3. today
  4. functions
  5. history

Original Text

For almost all of Earth’s history before the rise of the trilobites, life had mostly consisted of microscopic marine organisms. But then, scientists think an increase in oxygen allowed multicellular lifeforms to extract more energy from their food and perform more complex functions. This then enabled the rise of carnivores, which in turn spurred a productive arms race, resulting in what’s known as the Cambrian explosion. Within about 20 million years, life had branched out to include most of the animal groups we know today. Trilobites were an important part of this surge.

Frequently Occurring Word Combinations

ngrams of length 2

collocation frequency
million years 5
sea floor 3
extinction event 2

Important Words

  1. allowed
  2. animal
  3. arms
  4. branched
  5. cambrian
  6. carnivores
  7. complex
  8. consisted
  9. enabled
  10. energy
  11. explosion
  12. extract
  13. food
  14. functions
  15. groups
  16. history
  17. important
  18. include
  19. increase
  20. life
  21. lifeforms
  22. marine
  23. microscopic
  24. million
  25. multicellular
  26. organisms
  27. oxygen
  28. part
  29. perform
  30. productive
  31. race
  32. resulting
  33. rise
  34. scientists
  35. spurred
  36. surge
  37. today
  38. trilobites
  39. turn
  40. years