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PCAT Biology Evolution
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PCAT Biology Evolution
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25 Questions

1. Common ancestor is found at the trunk and the modern species at the tips of the branches

2. Appear to be useless but apparently had some ancestral functions

3. Populations will become sufficiently different from each other to be able to reproduce

4. Over many generations of natural selection - the favorable changes eventually results in such significant changes of the gene pool that we can say a new species has evolved

5. More offspring are produced than can survive

6. Impressions left by an organism ex: footprints

7. The evolution of new species - which are groups of individuals who can interbreed freely with each other but not with members of other speies

8. The process in which minerals replace the cells of an organism

9. Same basic anatomical features and evolutionary origins -demonstrate similar evolutionary patterns with late divergence of form due to differences in exposure to evolutioinary forces

10. A cluster of colloidal molecules surrounded by a shell of water -tend to absorb and incorporate substances from the surrounding environment

11. The emergence of a number of lineages from a single ancestral species -may diverge into a number of distinct species; the differences between them are those adaptive to a distinct lifestyle - or niche

12. Form in hollow spaces of rocks - as the organisms within decay

13. Change in the genetic makeup of a population with time -explained by the constant propagation of new variations in the genes of a species - some of which impart an adaptive advantage

14. Formed by minerals deposited in molds

15. Most organisms demonstrate the same basic needs and metabolic processes -require the same nutrients and contain similar cellular organelles and energy storage forms

16. Results from the geographic isolation of a population

17. Refers to changes in the composition of the gene pool due to chance -tend to be more pronounced in small populations - where it is sometimes called the founder effect

18. Mates are not randoomly chosen but rather selected according to criteria such as phenotype and proximity - the relative genotype ratios will be affected and will depart from the predictions of the Hardy-Weinberg equilibrium

19. All members of a particular species inhabiting a given locations

20. Offspring naturally show differences in their characteristics compared to their parents

21. The closer the organisms in the evolutionary scheme - the greater the similarity of their chemical constituents

22. Primitive crustacean (relative to the lobster) - which was dominant form of the early Paleozoic era

23. The most direct evidence of evolutionary change -represent the remains of an extinct ancestor -generally found in sedimentary rocks

24. The decimal fraction representing the presence of an allele for all members of a population that have this particular gene locus

25. Hairy elephant found in the Siberian ice

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