unit 6

2. when organisms impersonate other organisms to increase fitness
6. measurement of the ability of an individual to survive and reproduce successful offspring
7. group of individuals of the same species that live in the same area at the same time and can interbreed
11. Refers to the difference among individuals in a population
12. Any characteristic thatincreases the fitness of an individual
13. percent of individuals of a population that have a particular trait, expressed between 0 and 1
14. random changes in allele frequencies attributed to luck, not fitness
17. when a small part of a population is separated and colonizes a new area; it often responds differently to natural selection pressures
19. type of natural selection in which individuals with the average phenotype have an advantage; the extremes are selected agaisnt
20. type of natural selection in which individuals with one extreme phenotype have an advantage; the other extreme is selected against

1. the idea that those individuals best suited to their environment will achieve higher fitness
3. selection selection population due to human interference and seletion of desired traits
4. collection of the alleles present in a population
5. migration of individuals out of a population
8. islolation of a population due to differences in communication, mating rituotheror toher behaviors
9. when a population experiences a rapid, drastic reduction in size; reduces variation and changes allele frequencies
10. type of natural selection in which individuals at either extreme of the bell curve achieve higher fitness; the average is selected against
15. A necessary or desired commodity in an ecosystem- individuals of a population will compete for these
16. migration of new individuals into a population
18. describes the movement of genes/alleles/individuals between 2 neighboring populations, making populations more alike