7. Which event in life\'s diversification happened first? A evolution of mitocho

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7. Which event in life's diversification happened first? A evolution of mitochondria B. evolution of baleen C occurrence of Homo sapiens D. evolution of terrestrial plants 8. Which set of scientists are primarily known for examinations of fossils leading to the postulation of extinction as a process associated with life's diversity A. Mary Anning and Georges Cuvier B. Charles Lyell, James Hutton and William Smith C. Charles Darwin and Alfred Wallace 9. What is stratigraphy? A. The philosophy for how natural processes that exist now are different than the past B. Studying layers of the earth's crust reveals passage of time C. All types of species originated in volcanoes D. All types of species uniformly originated in standard grassland habitats 10. Natural selection A. does not alter frequency of alleles in a population. B requires natural resources to be unlimited. C relates to how some individual variation is heritable. D relates only to genotype, not phenotype. E all of the above an allele undergoes fixation through positive selection, what percentage does it represent within the population? A. 0% B. 2S% C. 50% D. 100% 12. If two individuals mate, both of them heterozygous at a locus (one dominant and one recessive allele), what will be the outcome? A A. The offspring will be either heterozygous, or homozygous for the recessive allele. B. The offspring will be either homozygous for the dominant allele, heterozygous, or homozygous for the recessive allele. C. The offspring will not evolve, because they will carry the same sets of alleles as the parents D. The recessive allele eventually will become the dominant allele in the population. E. None of the above. 13. If the heritability of a trait in a population is high A. few individuals have the trait B. most of the phenotypic variation for the trait in the population is due to environmental differences experienced by individuals C. most of the phenotypic variation for the trait in the population is due to genetic lifferences among individuals

Explanation / Answer

7. A. Eukaryotic cell emerged first hence mitocondria

8 A. Mary Anning was a fossil collector and Paleobotanist

9 B. Stratigraphy is the study of rock layers

10 C. Some individual variation is heritable

11 D a allele is said to be fixed when its the only variation present frequency 100 %

12 B example Tt X Tt = TT : Tt : tt =1 : 2 : 1

13 C As heritibility is defined as the changes in phenotype arising from genetic changes

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