BIO 182 Exam Questions and Answers 2025

The fact that many forms of aquatic animals look alike even though they had diverse ancestors can be attributed to __________________. a.) convergent evolution b.) divergent evolution c.) development of geographic races e.) chance alone - Correct Ans-convergent evolution If the frequency of one allele in a population is 0.7, what is the frequency of the alternate allele? a.) 0.09 b.) 0.49 c.) 0.21 e.) 0.30 d.) 0.42 - Correct Ans-0.30 The random loss of alleles in a population is called a.) mutation b.) selection c.) genetic drift e.) electrophoresis d.) gene flow - Correct Ans-genetic drift Sickle cell anemia is caused by a change in the amino acid sequence of the hemoglobin molecule. How many amino acids have been changed compared to normal hemoglobin? Bio 182 Bio 182 Bio 182 a.) 1 b.) 5 c.) 10 eds ands - Correct Ans-1 The similarity of bone structure in the forelimbs of many vertebrates is an example of a.) analogy b.) homology c.) digitality e.) convergence - Correct Ans-homology Genetic drift is the result of ______. a.) natural selection b.) chance c.) a large gene pool e.) differential reproductive success d.) environmental variation - Correct Ans-chance In the Hardy-Weinberg equation, the term 2pq represents the frequency of the a.) dominant homozygotes b.) recessive homozygotes c.) dominant allele e.) recessive allele d.) heterozygotes - Correct Ans-recessive homozygotes In the Hardy-Weinberg formula, what does p2represent? a.) frequency of the dominant allele Bio 182 Bio 182 b.) frequency of heterozygotes c.) frequency of the recessive allele e.) frequency of the homozygous dominants d.) frequency of the heterozygous recessives - Correct Ans-frequency of the homozygous dominants Errors in DNA replication, mutations, can sometimes have a positive effect on an organism's ability to survive or reproduce. This would be called a a.) advantageous mutation b.) lethal mutation c.) point mutation e.) chromosomal mutation d.) gene duplication - Correct Ans-advantageous mutation In The Origin of Species, Darwin argued that the mechanism of descent with modification was _____. a.) artificial selection b.) natural selection c.) Inheritance of acquired characteristics e.) uniformitarianism d.) none of the above - Correct Ans-natural selection -Match the following- Natural Selection Evolution Speciation - Correct Ans-Differential Reproduction Success Descent with Modification Formation of a new species Bio 182 The effects of genetic drift are most apparent in small populations. True False - Correct Ans-True Most of the seals in the North Sea are killed by a virus(e.g., dropped the population from 8000 to 800). In an effort to help preserve the species, scientists caught 20 seals and used them to start a new population in the northwest Pacific Ocean. Which of the following factors would most likely have the least impact in this new population? founder effect random mating genetic drift bottleneck effect - Correct Ans-random mating The similarity of the limb structures of frogs, birds, and humans is evidence of ______. analogy diversifying selection common ancestry genetic drift convergent evolution - Correct Ans-common ancestry