Biology Final Exam Flashcards

Study and practice for Biology Final Exam with these Flashcards. Learn about different terms, keywords, and much more with our flashcards made for students studying Biology Final Exam, and become a master of the topic.

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The theory of catatrophism
States that one worldwide disater led to massive extinction and subsuquent replacement
According to Lamarck, the characteristics of organisms changed because of
An innate drive for perfection
The most important evidence that Darwin used to develop his theory of natural selction came from
The Galopagos Islands
Natural selection operates to produce change in
Populations
The operation of natural selection depends upon the fact that
Some individuals have a better chance to produce more offspring
The word evolution as used in Biology literally means
Change
New combinations of genes may be produced by
All the above
Introduction of previously non existent genes into a population may be accomplished by
Non random mating
The Hardy-Weinberg formula is valuble for the calculation of changes in
Allele frequencies
In a population that is in Hardy-Weinberg equilibrium, the frequency of the recessive homozygous genotype is .49. The percentage of the population that is heterozygous is
42
The influence of genetic drift on allele frequencies increases as
Populations size decreases
The sharp reduction of the gene pool and the numbers of a population through a severe epidemic is an example of
The bottleneck effect
Stabilizing selection occurs when
The extremes of the population has a lesser chance to survive
In a certain bird species, the clutch size (the number of eggs laid by the female in one breeding season) ranges from 4 to 8 and the most frequent clutch size is 6. This phenomenon is an example of
Sexual selection
Directional selection occurs when
The environment controls which organism will survive