Unit 7
Across
- 2. ability of an organism to survive and produce fertile offspring
- 3. type of evolution where different species with a similar environment have similar traits
- 9. type of speciation that refers to the evolution of a new species due to organisms in the same population being geographically isolated over a long period of time
- 10. type of structure that is no longer used in the species but may have been used in ancestors
- 11. an event where a random process that reduces genetic variation within a small population due to separation from a larger population
- 12. process by which populations of organisms become reproductively isolated and new species form
- 13. type of structure that is varied in species of common ancestry
- 15. organisms struggle with other organisms to get limited resources
- 18. an event that can contribute to genetic drift like natural disasters
- 19. change in genetic makeup of a population over time
- 20. diagram used to show evolutionary relationships amongst species
- 22. type of barrier that prevents members of different species from mating to produce a zygote
Down
- 1. type of evolution when adaptation to new habitats results in phenotypic diversification
- 4. process where organisms with certain adaptations are able to survive and reproduce and pass on their adaptations to their offspring
- 5. role an organism plays within its environment
- 6. evolution of a new species that allows empty ecological roles or niches to be filled
- 7. represents the lineage that is least closely related to the other organisms
- 8. humans select desirable traits in species
- 9. type of structure where features of different species are similar in function but not in structure
- 14. type of barrier that keeps hybrid zygotes from developing into healthy, fertile adults
- 16. disappearance of a species so that no future generations will inhabit Earth
- 17. a random change in frequency of a certain allele in a population
- 21. type of speciation that refers to the evolution of a new species due to organisms being reproductively isolated from a surviving ancestral population