Evolution

4. when one end of the graph has higher phenotype frequencies than the ones in the middle
6. theory that explains how random changes in genetic material and competition for scarce resources cause species to change gradually
7. Charles____created the theory of evolution that is backed by natural selection
8. formation of new and distinct species that occurs during evolution
9. The one who comes down from a common ancestor
10. passed down characteristic that increases an organisms chance at survival
14. Ancestral species from which later species evolved
18. has no useful function in an organism but shows a link to a common ancestor
20. situation where allele frequencies in a population will not evolve
22. inheritable differences are due to__
23. mutations do not always affect an organism____
24. the remains of a plant or animal that existed a long time ago
25. Natural selection on single-gene traits can lead to changes in____ frequencies
26. the geographical distribution of species

1. The animal Charles Darwin studied
2. ____would indicate an organism's ability to survive and reproduce in their environment
3. when individuals are better suited to their environment and survive and reproduce most successfully
5. this term describes how organisms best suited for their environment are most successful at surviving and reproducing
11. type of genetic drift that follows the colonization of a new habitat by a small group of individuals is____
12. group of organisms of the same species populating a specific area
13. when the curve of the graph has higher phenotype frequencies in the middle compared to either ends
15. A variety of traits and alleles in a population
16. artificial selection practiced by farmers is called____
17. body parts that are similar in related species; show that they were inherited from a common ancestor
19. type of graph that favors extreme traits over intermediate
21. well-tested explanation that brings together a broad spectrum of obervations