Biology review

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Across
  1. 3. Protein that binds to antigens to fight pathogens
  2. 4. Organelle that produces energy through respiration
  3. 9. Trait that improves survival in an environment
  4. 10. Protection against disease through defense systems
  5. 12. Genetic makeup of an organism
  6. 15. Jelly-like substance where cell organelles are found
  7. 17. Biome with low rainfall and extreme temperatures
  8. 19. Unit of heredity carried on DNA
  9. 21. Plant growth response to gravity
  10. 24. Adaptation where one species resembles another
  11. 25. Passing of traits from parents to offspring
  12. 27. Substance that stimulates immunity without causing illness
Down
  1. 1. Change in DNA sequence
  2. 2. Organelle in plants where photosynthesis occurs
  3. 5. Molecule that triggers an immune response
  4. 6. Biome with high rainfall and biodiversity
  5. 7. White blood cell that engulfs and digests pathogens
  6. 8. Growth response of plants to environmental stimuli
  7. 11. Plant growth response to touch
  8. 13. Plant growth response toward light
  9. 14. Physical expression of genes
  10. 16. Cold biome with permafrost and limited vegetation
  11. 18. Grassland biome with scattered trees and seasonal rains
  12. 20. Different forms of a gene
  13. 22. Outer boundary of the cell that regulates entry and exit
  14. 23. Site of protein synthesis in cells
  15. 26. Control center of the cell containing DNA