Evolution

2. Isolation / two populations separated physically by geographic barriers
4. Extinction / many types of living things become extinct at the same time
13. evolution / two or more species diverge from a common ancestor
14. / an organism in more than one distinct color or form
16. radiation / rapid growth in the diversity of a group of organisms
17. / physical and biological conditions in which an organism lives and use
18. / an organisms physical characteristics
20. / formation of new species
21. Pool / combined genetic information of all members from specific groups
22. / British naturalist who proposed the theory of biological evolution by natural selection
24. effect / migration of small subgroup of a population which changes allele frequencies
25. Evolution / the change in inherited traits over successive generations in populations of organisms
26. Record / information about past life

1. / British naturalist who co-developed the theory of evolution and natural selection
3. Selection / certain individuals that are better suited to their environment survive and reproduce most successfully
4. / change in a DNA sequence that affects genetic information
5. Mutations / a mutation occurring in the absence of mutagens
6. / the phenomenon of one variant of a gene on a chromosome masking
7. effect / environmental or human-caused changes that lower a populations gene pool
8. / an organisms genetic makeup
9. / specialized cell involved in sexual reproduction
10. Evolution / change from an ancestor to a descendant species
11. Pressure / an agent that tends to make a population change genetically
12. / spreading apart
15. Drift / changes in allele frequencies occurring in small populations
19. Speciation / bursts of evolutionary activity
21. Diversity / sum of different forms of genetic information carried by all organisms living on Earth today
22. sequence / a laboratory technique used to determine the exact sequence of bases in a DNA molecule
23. / can be masked by a dominant gene and is the second variant