Biology

123456789101112131415161718192021
Across
  1. 3. an animal that changes colour to keep them at the right temperature
  2. 4. preserved remains of organisms from millions of years ago
  3. 8. sleeping throughout winter and conserving energy
  4. 9. comes from external factors
  5. 11. section of DNA that holds the information to produce a characteristic
  6. 13. the differences within a species
  7. 15. part of the cell where DNA is stored
  8. 17. when species depend on each other
  9. 19. a process that helps an animal survive
  10. 20. type of tree that doesn't lose its leaves
  11. 21. comes from parents
Down
  1. 1. when animals and plants fight for a limited supply of resources
  2. 2. long strand of DNA that contains many genes
  3. 5. a group of similar organisms
  4. 6. something only plants compete for
  5. 7. a chemical that contains all the information needed to make an organism
  6. 10. population of organisms does not have the adaptations to survive in the environment
  7. 12. cause of extinction created by humans
  8. 14. moving somewhere with more food and a higher chance of survival
  9. 16. more species in an area means more ...
  10. 18. cause of extinction created naturally