Cells and Heredity

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Across
  1. 7. similar structures that related species have inherited from a common ancestor
  2. 10. the process that occurs in the mitochondria
  3. 13. the factors that may change in an experiment
  4. 17. a well-tested concept that explains a wide range of observations
  5. 18. an organism's physical appearance
  6. 19. a group of organs working together to perform a specific job
  7. 20. Yeast cells go through _____________________ fermentation.
  8. 23. the method used by scientists to determine the actual age of fossils
  9. 24. the energy source used in photosynthesis
  10. 26. genetic engineering involves the transfer of this substance from one organism into another.
  11. 27. Base that pairs with thymine in DNA.
  12. 28. All organic compounds contain the element ____________________.
  13. 29. main animal Darwin used to come up with his theory of evolution
Down
  1. 1. a trait that helps an organism survive and reproduce
  2. 2. the process by which water diffuses across a membrane
  3. 3. The raw materials of photosynthesis are water and _____________.
  4. 4. The _____________________was an important invention because it allowed scientists to see and learn about cell.
  5. 5. one tool that helps scientists understand how extinct organisms looked and evolved
  6. 6. the organelle that packages and releases materials out of the cell
  7. 8. The part of the cell that provides structural support for the plant cell is the ______________ ________________.
  8. 9. Yy, Mm, and Tt represent ______________ genotypes
  9. 11. a possible explanation for a set of observations
  10. 12. composed of cells working together to perform a particular job
  11. 14. the part of the cell responsible for protein synthesis
  12. 15. When two or more elements combine chemically, they form a __________________________.
  13. 16. the process responsible for producing most of the world's oxygen
  14. 21. composed of tissues working together to perform a specific job
  15. 22. The basic unit of structure and function in a living organism is called a _______________.
  16. 23. When the cell’s energy is required to move materials through a cell membrane, this type of transport is called:_____________________.
  17. 25. Base that pairs with cytosine in DNA.