Across
- 3. body parts in different organisms that have the same evolutionary history, but may now have developed different functions for different species
- 5. body parts in different organisms that have the same function, but developed because those adaptations were advantageous in similar environments
- 9. adaptations that result in greater vulnerability are weeded out by predators or environmental conditions
- 11. structures or behaviors within a population that increase that population's survival
- 14. physical remnants of once-living organisms
- 16. body parts that are present in reduced or non-functioning forms because they are no longer needed for survival
- 17. the rate at which a particular allele is found within a population
- 20. the likelihood of a gene being passed on to the next generation
- 21. all members of a species that reproduce with each other
- 22. the variety of alleles present within a population
Down
- 1. process by which new species develop
- 2. changes in geography, timing, cause intermediate phenotypes to disappear with opposite extremes occurring more frequently
- 4. disappearance of a species
- 6. organisms that reproduce with one another whose offspring are fertile
- 7. differences in the phenotypes of the individuals of a population
- 8. bell-shaped curve with the highest number of individuals having the most advantageous (optimal) phenotypes
- 10. extreme phenotypes disappear from within a population
- 12. changes leading to a new population that can no longer reproduce with the original population
- 13. an extreme phenotype shows up with increasing frequency within a population
- 15. humans breed other populations to develop populations that benefit humans
- 18. the comparison of physical structures of embryos of different organisms
- 19. the study of where species can be found, both in the past and in the present