Across
- 4. the monthly cycle when the lining of the uterus is shed a regrown (12)
- 11. Darwin's theory of how members of a species with advantageous traits will survive and others will die out (7,9)
- 12. Differences between organisms of the same species (9)
- 13. a section of dna that codes for a particular characteristic (4)
- 14. The gradual change of a species over time (9)
- 16. The scientist who proposed the theory of evolution was Charles _______ (6)
Down
- 1. A group of organisms that can successfully breed and produce fertile offspring (7)
- 2. The male gamete (5)
- 3. The process where a male and female gamete's nuclei fuse (13)
- 5. Part of the cell that contains genetic information (7)
- 6. the process of passing on genetic information from parent to offspring (11)
- 7. DNA is coiled up forming this structure (10)
- 8. the distinguishing features or quality of an organism (14)
- 9. When species completely dies out it is said to be ______ (7)
- 10. Genetic material housed in the nucleus (3)
- 15. chromosomes are arranged into 23 _______ (5)