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11

Theory of Evolution

QuestionAnswer
1. Evolution change in a kind of organism over time; process by which modern organisms have descended from ancient organisms
2. Charles Darwin English natural scientist who formulated a theory of evolution by natural selection (1809-1882)
3. species group of similar organisms that can breed and produce fertile offspring
4. extinction no longer in existence
5. competition for resources Part of the theory of natural selection. Occurs because there are more organisms in a community than there is food & shelter to support them.
6. natural selection process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest
7. genetic variation The variety of different types of genes in a species or population.
8. struggle for existence Part of the theory of natural selection. Occurs because there is competition for resoruces.
9. reproduction the process of generating offspring
10. hereditary traits characteristics that are inherited from our ancestors via DNA
11. carrying capacity largest number of individuals of a population that a environment can support
12. asexual reproduction process by which a single parent reproduces by itself
13. sexual reproduction process by which cells from two different parents unite to produce the first cell of a new organism
14. limiting factors environmental factors that restrict population growth
15. recombination a combining of genes or characters different from what they were in the parents
16. acquired trait characteristic that an organism develops after it is born
17. clone an exact duplicate
18. gamete
19. ovum egg cell
20. mutation change in a DNA sequence that affects genetic information
21. survival of the fittest a natural process resulting in the evolution of organisms best adapted to the environment
22. gene frequency how often a particular gene occurs in the population
23. adaptations traits that improve an individual's ability to survive and reproduce
24. Prokaryote unicellular organism lacking a nucleus
25. Eukaryote A cell that contains a nucleus and membrane bound organelles
Created by: kyliew2014
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