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