Biology Crossword 2023

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Across
  1. 4. A characteristic and the earliest adaptations seen on hominins
  2. 5. Shark with a spike-like crown
  3. 8. Informative structural biology of an animal that tells you which species is observed, whether an organism is male or female
  4. 9. 1,000 years ago this country lost essentially all of its largest animals
  5. 10. These went extinct due to the Hangenberg Event.
  6. 14. Until 1938, we didn’t know that these sharks were still around
  7. 16. Does not usually fossilize very well
  8. 17. If one was to dive 5-25 meters under the sea, these would not be seen as they were back in the early 70’s
  9. 18. Microscopic organisms that have over 1 trillion species.
  10. 19. Another argument or potential explanation as to how so many species had gone extinct
  11. 20. State in which rusty crayfish are native to
  12. 22. This amphibian displays the transition of breathing in water to breathing on land in a matter of months
  13. 23. Way of transportation in which any species from all around the world ends up in the Great Lakes
  14. 25. Evolutionary relationship of species including the great apes
  15. 27. Invasive species pose a threat to native species just like how these can pose a threat to humanity
Down
  1. 1. A controversial take and idea as to why many species have gone extinct and are endangered
  2. 2. Indication on a shark's pelvic fins that determine whether it is male or female
  3. 3. Extinct cephalopods that slightly resemble that of a squid except with a hard shell
  4. 6. The largest of animals 100 lbs+, tragically many have gone extinct in the past 50,000 years and more
  5. 7. Used for feeding and good at manipulating the environment
  6. 9. These bigger types of organisms (both plant and animal) have over 85 million species
  7. 11. Group of cephalopods that include squids,cuttlefish, and belemnites
  8. 12. The world’s largest freshwater ecosystem
  9. 13. These are the biggest out of all of the placoderm groups, they have a much more movable head
  10. 15. Early humans coined this term
  11. 21. This type of species poses an extreme threat to existing species
  12. 24. Large mammals affected by human intervention
  13. 26. Where the national museum of Kenya is located
  14. 28. These kinds of crayfish are invading the native crayfishes