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26 Cards in this Set
- Front
- Back
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Whichof the following can evolve (according to the biological definition ofevolution)? A. agroup of fir trees in Oregon B.Earth’s climate C. asingle fly as it develops from larva to adult D. afossilized turtle |
A. a group of fir trees in Oregon |
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Whichof the following statements supports the concept of natural selection? A.Individuals with the traits best suited to the prevailing conditions tend toleave more surviving, fertile offspring. B.Traits that increase survival and reproduction in the current generation willbe more common in the next generation. C. BothA and B are correct. D. Noneof the choices is correct. |
D. None of the choices is correct. |
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Fernsrequire moisture to reproduce. What will happen to a fern population during aprolonged drought? A. Tosave the species, some of the ferns will acquire the ability to reproducewithout water. B. Ifnone of the ferns already have the ability to reproduce without water, theferns might go extinct. |
B. If none of the ferns already have the ability to reproduce without water, the ferns might go extinct. |
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•If 50 of those alleles are a,what is allele frequency of a? A.50/100or 0.5 B.50/200or 0.25 C.150/200or 0.75 D.100/200or 0.5 |
B.50/200 or 0.25 |
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•In looking at fossils of horses, it isclear that horses have gotten taller over time. What kind of selections does this represent? A.Directional B.Disruptive C.Stabilizing D.None of the above |
A.Directional |
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•What did Darwin observe that lead him todevelop his ideas about the origin of species? |
Looking at Finches and how they had adapted to all of the niches observed similarities and differences and that they came from a common ancestor |
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•How is artificial selection differentfrom natural selection? |
Artificial Selection- choice or selection of traits Natural selection- environmental factors cause different reproductive success of one set of individuals over the others |
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Whatis modern evolutionary synthesis? |
genetic mutations create new alleles in a population which become the raw material for evolution. |
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•How can natural selection favor differentphenotypes at different times? |
changing allele frequency within the population in response to environmental stimuli (environment is always changing and no guarantee of its direction) |
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What does survival of the fittest reallymean? |
best genes for these environmental conditions to allow them to be successful and reproduced |
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•What are the 5 conditions for theHardy-Weinberg Equilibrium?fault |
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•Why doesn’t the Hardy-Weinbergequilibrium occur in a real population? |
None of their conditions can be met in real life |
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•What is directional selection? |
One extreme phenotype selected for over the others Ex. Horses, moths |
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•What is disruptive selection? |
2 or more phenotypes which are selected for over the middle ex. Snails ....way new species are created |
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•What is stabilizing selection? |
Selecting fro intermediate traits over extremes ex. human body weight |
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•Female weaver birds select a mate basedon his nest-building ability. What typeof sexual selection is this? A.Intersexual lB.Intrasexual |
A.Intersexual |
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Howdoes sexual selection promote traits that would seem to decrease fitness? |
Selecting traits that will make the male more noticeable to predators, spending extra energy producing traits to attract make and not necessarily lead to success |
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What is the difference betweenintrasexual selection and intersexual selection? |
IntRA-asexual Selection-same sex fighting each other for access to the opposite Inter sexual selection- choice selection of mate from multiple individuals opposite sex |
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•How can mutations affect an organism’sphenotype? |
can produce a new allele and add to the phenotype |
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•How does sampling error cause geneticdrift? |
within small population sampling error changes the allele frequency, as the frequency changes over generations you can remove alleles from population |
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•What is the difference between thefounder effect and a population bottleneck? |
founders effect and population bottle neck - both -remove alleles from the population but in founders effect we can have gene flow to introduce new alleles neck into the population in population bottleneck they are lost for good |
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• What is genetic drift? |
change in allele frequencies that occur by chance can remove alleles from population |
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•What is gene flow? |
move alleles between populations to increase variation. ex. rabbits reverse genetic drift or natural selection |
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•What is nonrandom mating? |
choice of mate |
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•How did harvesting the large fish only orsmall fish only give different results from one another? |
putting a different stress on the population will drive the changed in population size. |
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•How many mechanisms of Evolution arethere? |
6. hary weinbery natrual selection mutation genetic drift nonrandom mating gene flow |
