Science

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Across
  1. 1. an individual, complete living entity or creature that is capable of growing, reproducing, responding to its environment, and maintaining life processes
  2. 6. the fundamental structural, functional, and biological unit of all known living organisms
  3. 8. the chemical process by which plants, algae, and some bacteria use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar (glucose)
  4. 9. specialized, membrane-bound structures found inside cells that act as the cell's power plants by converting nutrients into usable energy
  5. 10. a pure chemical substance made entirely of one specific type of atom that cannot be broken down into simpler substances by chemical means
  6. 14. a cooperative group of similar, specialized cells that work together to perform a specific function within an organism
  7. 15. a self-contained group of different tissues that work together to perform a specific vital function within an organism
  8. 17. a group of living things
  9. 18. a plant or animal that no longer exists
Down
  1. 2. a specialized, membrane-bound structure inside a cell that contains the organism's genetic material (DNA) and acts as the cell's control center
  2. 3. an organized chart that displays all known chemical elements arranged in order of their increasing atomic numbera
  3. 4. a specialized blood vessel that carries oxygen-depleted blood back toward the heart from different parts of the body
  4. 5. the smallest fundamental unit of a chemical element that still keeps all the chemical properties of that element
  5. 7. a thread-like structure made of tightly packaged DNA and proteins, found inside the nucleus of most living cells
  6. 11. a permanent alteration or change in the DNA sequence that makes up a gene or chromosome inside a cell
  7. 12. an inherited physical trait or behavioral characteristic that evolves over generations, helping an organism survive and reproduce in its specific environment
  8. 13. Specific segments of DNA that act as instructions to produce proteins, which ultimately determine physical characteristics.
  9. 16. the double-helix molecule that carries the inherited genetic blueprint instructions for the development, functioning, growth, and reproduction of all living organisms