Biology

12345678910
Across
  1. 4. the process of increasing in physical size.
  2. 7. an individual animal, plant, or single-celled life form.
  3. 8. the smallest structural unit of an organism.
  4. 9. a substance which slows down or prevents a particular chemical reaction.
  5. 10. a thing that is composed of two or more separate elements.
Down
  1. 1. an idea or explanation for something that is based on known facts but has not yet been proved.
  2. 2. the basic unit of a chemical element.
  3. 3. the action or process of observing something by sense organ.
  4. 5. type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.
  5. 6. a substance that increases the rate of a chemical reaction.