Geologic Time

3. The transmission of genetic characters from parents to offspring.
6. Any alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment.
8. Change in the gene pool of a population from generation to generation by such processes as mutation, natural selection, and genetic drift.
10. Selection The process by which forms of life having traits that better enable them to adapt to specific environmental pressures, such as predators, changes in climate, or competition for food or mates, will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations.
11. Of or relating to the time or a period prior to recorded history.
13. The science dealing with the formation, development, structure, and functional activities of embryos.

1. Any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint, etc.
2. Biology The branch of biology that deals with the nature of biological phenomena at the molecular level through the study of DNA and RNA, proteins, and other macromolecules.
4. Biological diversity among and within plant and animal species in an environment.
5. A plant or animal species having no living member remaining anywhere, not in the wild, in a naturalized population, nor in captivity.
7. The science dealing with the structure of animals and plants.
9. The study of the geographical distribution of living things.
12. To develop by a process of evolution to a different adaptive state or condition.