Across
- 3. The theory that natural disasters shaped the earth's landforms and caused extinction.
- 4. The idea that geologic processes that shape the earth remain constant over time.
- 5. Structure or organ that are similar structure, but different in purpose.
- 8. Study of embryos, used to find similarities between species during development.
- 9. Producing more offspring than will likely survive.
- 13. The gradual biological process of change by which descendants begin to greatly differ from their ancestors.
- 14. The process by which humans select traits through breeding.
- 15. A preserved trace of an organism from the past.
- 17. A difference in a physical trait.
- 18. The measure of survival ability and ability to produce for offspring.
- 19. A natural mechanism by which a species, or member of that species inherits a beneficial adaptation that allows it to produce more offspring than others.
Down
- 1. The ability for a trait to be passed down.
- 2. The complete elimination of an entire species .
- 3. A form of evolution between unrelated species, that result in similar characteristics, due to similar environmental conditions.
- 6. The total number of genes of every individual in a population
- 7. A feature that an organism develops to better survive in its environment.
- 10. The process in which multiple species evolve in response to the changes in each other.
- 11. A form of evolution between similarly related species, into more different species, due to differing environmental conditions.
- 12. An observable change in the allele frequencies in a population.
- 16. The physical movement of particular alleles from one population, to another.