Biology vocabulary

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Across
  1. 2. a chemical link between two atoms where electron pairs are shared
  2. 4. The change of monkey to humans
  3. 5. the smallest unit of life
  4. 8. group of atoms that has an electric charge
  5. 11. A prokaryotic cell is a primitive type of cell that is characterized by the absence of a nucleus
  6. 12. A unique substance that consists of two or more elements combined in fixed proportions.
  7. 13. occurs when the sperm from the male parent fertilizes an egg from the female parent
  8. 15. is the smallest unit of matter that has distinctive chemical and physical properties
  9. 16. basic units of all living tissues
  10. 17. of life
Down
  1. 1. a mode of reproduction in which a new offspring is produced by a single parent
  2. 2. The outer part of the cell
  3. 3. he genetic information inside the cells of the body that helps make people who they are
  4. 6. any cell or organism that possesses a clearly defined nucleus
  5. 7. A negatively charged subatomic particle that can be either bound to an atom
  6. 8. Water concentration to body fluid
  7. 9. the middle part of the cell
  8. 10. bonds formed between ions with opposite charges
  9. 14. The small unit unit of matter indivisible by chemical means