Biology crossword puzzle

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Across
  1. 3. - A lack of evolutionary change over a long period during the history of a species
  2. 6. - the place in which an organism lives out its life
  3. 7. conditions needed for life.
  4. 9. generally larger and more complex than a prokaryote.
  5. 11. - microscopic, unicellular organism without a nucleus or other membrane-bound organelles.
  6. 12. - the scientific study of interactions between organisms and their environments, focusing on energy transfer.
  7. 13. - the role a species plays in a community; its total way of life
  8. 15. - a taxonomic group that includes multiple species that are closely related and share common characteristics
  9. 17. - A group of organisms that can interbreed and produce viable offspring
  10. 19. and contains DNA.
  11. 21. - substance that is able to kill or inhibit the growth of bacteria.
  12. 22. - Differences in the sequences of genes between individuals.
  13. 23. - the central membrane-bound organelle that manages cellular
  14. 25. - A substance used for destroying insects or other organisms.
  15. 28. - The ability of an organism to survive in its environment long enough to reproduce
  16. 29. -all living organisms inhabiting the Earth
  17. 31. what enters and leaves the cell.
  18. 33. - specialized structure that carries out a specific cell function in
  19. 34. - Microscopic plants that float among the other plankton in the upper layer of the oceans.
  20. 37. membrane - flexible, selectively permeable boundary that helps
  21. 39. - regulation of an organism’s internal environment to
Down
  1. 1. - The total variety of organisms. The more different types of organisms = healthier ecosystem
  2. 2. - Ingest (eat) food containing the sun’s energy. All Herbivores, Carnivores, Omnivores, Decomposers
  3. 4. - 1 half of the replicated/duplicated chromosome.
  4. 5. parts of the cell at the same time.
  5. 8. - cell that has 2 complete sets of chromosomes, one set from each parent.
  6. 10. - When a cell is damaged beyond repair, it destroys itself (pop!)
  7. 14. - The concentration of a toxin (like a pesticide) in the tissues of organisms in a lower trophic level gets passed up to the next level when they get eaten. These toxins cannot be flushed out of the body, so each trophic level ends up with higher amounts of toxic material in their tissues.
  8. 16. - the slow, gradual genetic change in an entire population of organisms over time...a looooooooong time!
  9. 18. - unicellular organism with membrane-bound nucleus and
  10. 20. - Type of consumer that eats dead plants, animals and other organisms.
  11. 24. - The process of burning something
  12. 25. - all autotrophs (plants), they trap energy from the sun.
  13. 26. - species evolve through small,sometimes hard to see, changes over long periods of time.
  14. 27. - the formation of a new species can occur in a variety of ways
  15. 30. - physical or behavioral change that makes a species more likely to be successful in its environment.
  16. 32. - Anything that eats or consumes other living organisms.
  17. 35. - a cell that has only one set of chromosomes.
  18. 36. - the plural for nucleus
  19. 38. - The part of the cell cycle that divides the chromosomes into two new identical nuclei, occurs just before the cell actually divides.