Across
- 3. a group of individuals of the same species living and interbreeding within a given area.
- 5. small group leaves to start a new colony ex: butterflies
- 12. a rapid increase in the number of species with a common ancestor
- 15. an event that drastically reduces the size of a population
- 17. average phenotype has higher fitness ex: human birth weight
- 19. having the same or a similar relation; corresponding, as in relative position or structure ex. human arm, bat wing
- 20. differences between individuals of the same species
Down
- 1. used to arrange geological events, and the rocks they leave behind, in a sequence
- 2. A measure of how common an allele is in a population; the proportion of all alleles at one gene locus that are of one specific type in a population.Jul 26, 2004
- 4. refers to all of the variety of life that exists on Earth.
- 6. those organisms best adapted to their environment will survive and reproduce
- 7. The physical separation of members of a population
- 8. theory that proposes that small changes occur over time
- 9. random change in allele frequency due to luck and not fitness ex: landslide or flyswatter
- 10. Structures that have no apparent function and appear to be residual parts from a past ancestor
- 11. extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype ex: moths
- 13. calculates an age in years for geologic materials by measuring the presence of a short-life radioactive element
- 14. a defense mechanism or tactic that organisms use to disguise their appearance, usually to blend in with their surroundings.
- 16. the study of the formation and development of an embryo and fetus.
- 18. the evolved resemblance of a species acting as 'mimic' to a living or non-living 'model', such that a selective agent or 'dupe', unable to distinguish between them, interacts with the mimic as it would with the model — to the benefit of the mimic.