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Exam-Biology 1108 - Exam 1 with Complete Solutions
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Exam-Biology 1108 - Exam 1 with Complete Solutions
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Exam-Biology 1108 - Exam 1 with Complete SolutionsEvolution CORRECT ANS-Descent with modifications; the idea that living species are
descendants of ancestral species that were different from the present day ones.
Natural Selection CORRECT ANS-A process in which individuals that have certain inherited
traits tend to survive and reproduce at higher rates than other individuals because of those
traits.
Evolutionary Adaptation CORRECT ANS-A genotype of inherited traits that enhance an
individuals ability to survive and reproduce in a particular movement.
Homology CORRECT ANS-Similarity in characteristics resulting from a shared ancestry.
Vestigial Structures CORRECT ANS-A feature of an organism that is a historical remnant of
a structure that served a function in the organism's ancestors. Ex. pelvis and leg bones in
some snakes
Convergent Evolution (Analogous Structure) CORRECT ANS-The evolution of similar
features in independent evolutionary lineages. In such examples in which species share
, Exam-Biology 1108 - Exam 1 with Complete Solutions
features because of convergent evolution, the resemblance is said to be analogous, not
homologous. Analogous features share similar function but not common ancestry.
Biogeography CORRECT ANS-The scientific study of the past and present geographic
distributions of species.
Endemic CORRECT ANS-Referring to a species that is confined to a specific geographic area.
Microevolution CORRECT ANS-Evolutionary change below the species level; change in the
allele frequencies in a population over generations.
Modern Synthesis CORRECT ANS-A consolidation of the results of various lines of
investigation from the 1920s through the 1950s that supported and reconciled the Darwinian
theory of evolution and the Mendelian laws of inheritance in terms of natural selection acting
on genetic variation
, Exam-Biology 1108 - Exam 1 with Complete Solutions
Genetic Drift CORRECT ANS-A process in which chance events cause unpredictable
fluctuations in allele frequencies from one generation to the next. Effects of genetic drift are
more pronounced in small populations.
Gene Flow CORRECT ANS-The transfer of alleles from one population to another, resulting
from the movement of fertile individuals or their gametes.
Mutation (Point mutation and chromosomal changes) CORRECT ANS-A change in the
nucleotide sequence of an organism's DNA or in the DNA or RNA of a virus.
P.M. - A change in a single nucleotide pair (base pair) of a gene. Ex. Sickle cell anemia
C.C. - Deletion, insertion or rearrangement of already present loci. Frequently harmful.
Population CORRECT ANS-A group of individuals of the same species that live in the same
area and interbreed, producing fertile offspring.
Gene Pool CORRECT ANS-The aggregate of all copies of every type of allele at all loci in
every individual in a population. The term is also used in a more restricted sense as the
aggregate of alleles for just one or a few loci in a population.
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