Across
- 2. a cell formed from the combined egg and sperm cells
- 5. a molecule that contains information that determines traits
- 7. a tool used to see cells
- 8. the egg cells found in a plant
- 10. a characteristic of an organism
- 12. a kind of trait that is learned or changed during life
- 13. the sperm cells found in a plant
- 14. the smallest units of life
- 15. the study of life
Down
- 1. the classification of species
- 3. a group of organisms that can breed to produce a fertile offspring
- 4. a kind of trait that is passed on to an offspring
- 6. a difference in the form of a trait
- 8. a structure within a cell that performs a certain job for that cell
- 9. the organelle that holds the DNA
- 11. a life form whose parents are from two different species