Biology

123456789101112131415161718192021222324252627
Across
  1. 2. a hollow muscular organ the pumps bloood around the body
  2. 6. bubble like structures the provide an enormous amount of surface area
  3. 7. an inhereted trait that increases an organisms chances of survival
  4. 9. separate waste and extra water from the blood
  5. 15. all living organisms are related to one another
  6. 16. organs that exchange oxygen
  7. 17. blood circulates entirely within blood vessels that extend through the body
  8. 20. the process of change over time
  9. 22. structures that concentrate waste and add then to digestive wastes
  10. 24. proposed a mechanism for evolution
  11. 25. pumps blood out oxygen rich blood
  12. 27. the ability to survive and reproduce
Down
  1. 1. tube like excretory structures that filter body fluid
  2. 3. feathery structure that expose a large surface area of thin selectively permeable membranes to water
  3. 4. "leftover" traces of evolution that serve no purpose
  4. 5. use kidneys to get to get rid of ammonia
  5. 8. blood is only partially contained within a system of blood vessels as it travels through the body
  6. 10. chemical or agent in the environment that cause mutation
  7. 11. embryos of all vertebrates are very similar early on
  8. 12. each living species had descended with changes from other species over time
  9. 13. each species produce more That can survive
  10. 14. receives oxygen poor blood
  11. 18. heritable changes in genetic information
  12. 19. gene mutations that involve changes in one or few nucleotides
  13. 21. spongy cavities
  14. 23. animals remove ammonia waste through the process
  15. 26. a record of the history of life on earth