Across
- 4. The most recent ancestral form or species from which two different species evolved
- 6. Traits that improve an individual's ability to survive and reproduce
- 7. Movement of alleles from one population to another
- 10. Similarity in organic molecules such as proteins and DNA are evidence for common ancestry
- 12. An evolutionary pattern in which many species evolve from a single ancestral species
- 13. Process in which two or more species evolve in response to changes in each other
- 15. When individuals select mates based on heritable traits
- 16. The formation of new and distinct species in the course of evolution.
- 17. A hypothesis that has been tested with a significant amount of data
- 19. A change in the allele frequency of a population as a result of chance events rather than natural selection.
- 20. Pattern of evolution in which long stable periods are interrupted by brief periods of more rapid change
- 22. A structure that is present in an organism but no longer serves its original purpose
- 23. Change over time
- 24. A process in which individuals that have certain inherited traits tend to survive and reproduce at higher rates than other individuals because of those traits.
- 25. Process by which unrelated organisms independently evolve similarities when adapting to similar environments
- 26. Number of times that an allele occurs in a gene pool compared with the number of alleles in that pool for the same gene
- 27. Study of embryos and their development
- 28. measure of an organism's ability to survive and produce offspring relative to other members of a population
- 29. Proposed the theory of evolution by natural selection
Down
- 1. Separation of species or populations so that they cannot interbreed and produce fertile offspring
- 2. A random error in gene replication that leads to a change
- 3. A proposed explanation in evolutionary biology stating that new species arise from the result of slight modifications (mutations and resulting phenotypic changes) over many generations.
- 5. A term that typically describes a species that no longer has any known living individuals.
- 8. Study of the distribution of organisms around the world
- 9. Selection by humans for breeding of useful traits from the natural variation among different organisms
- 11. Combined genetic information of all the members of a particular population
- 14. Body part that is similar in structure on different organisms but performs different functions
- 18. Body parts that share a common function, but not structure
- 21. Information about past life, including the structure of organisms, what they ate, what ate them, in what environment they lived, and the order in which they lived