Biology crosswork

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Across
  1. 2. Body systems responsible for fighting off infections
  2. 8. A simple, single-celled organism that lacks a nucleus
  3. 9. The mechanism of evolution where the most fit organisms survive and reproduce
  4. 12. A hydrophobic molecule used for long-term energy storage and insulation
  5. 13. The organelle where glucose is broken down to create ATP energy
  6. 16. The formation of a new and distinct species over the course of evolution
  7. 19. The site of photosynthesis where light energy is converted into chemical energy
  8. 21. Factors in an ecosystem that are not alive
  9. 22. Cell division that creates four genetically different haploid gametes
  10. 23. The stage of the cell cycle where the nucleus divides into two identical nuclei
  11. 27. consumer that feeds directly on producers
  12. 29. A symbiotic relationship in which both species benefit from the relationship
  13. 32. Organism that obtains energy from the foods it consumes; also called a consumer
  14. 33. A biological catalyst that lowers activation energy to speed up reactions
  15. 34. The single cell that is formed when a sperm and egg unite during fertilization
  16. 36. Each step in the energy pyramid
  17. 39. Any change in the DNA sequence that can be helpful, harmful, or neutral
  18. 40. An organism that makes its own food
Down
  1. 1. The genetic combination of alleles represented by letters like Aa or bb
  2. 3. An organism like a fungus that breaks down dead matter and returns nutrients to the soil
  3. 4. A condition in which both alleles for a gene are fully and separately expressed
  4. 5. An organism that can make its own food.
  5. 6. The process at the ribosome where mRNA is read to build a protein
  6. 7. A medicine used to kill bacterial infections but is ineffective against viruses
  7. 10. A close relationship between two species that benefits at least one of the species.
  8. 11. A beneficial trait that helps an organism survive in its specific environment
  9. 14. The specific term for water diffusing across a semi-permeable membrane
  10. 15. The process occurring in the nucleus where DNA is used to make mRNA
  11. 17. A macromolecule composed of monosaccharides used for quick energy
  12. 18. The movement of materials across a membrane that requires the cell to use energy
  13. 20. The monomer of nucleic acids made of a sugar, phosphate, and nitrogen base
  14. 24. Nonliving, requires a host to replicate, move and survive
  15. 25. The physical expression of a trait that you can actually observe with your eyes
  16. 26. Having two different versions of an allele for a specific gene
  17. 28. An association between two organisms in which one benefits and the other derives neither benefit nor harm.
  18. 30. A viral replication cycle in which copies of a virus are made within a host cell, which then bursts open, releasing new viruses
  19. 31. A genetic situation where the phenotype is a blend
  20. 35. A structure that has lost its original function through evolution
  21. 37. Any type of harmful agent that can cause illness (virus or bacteria)
  22. 38. The constant struggle of a cell to keep its internal conditions balanced and stable