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Biology Test

Enter the letter for the matching Answer
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1.
T/F The weight of human infants at birth is under the influence of disruptive selection.
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2.
When does geographic isolation occur?
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3.
Speciation probably occurred in Galapagos finches
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4.
T/F Sexula reproduction can produce many dif. phenotypes
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5.
Hyp tested by Grants: T/F Differences in the finches' beak size/shape produce dif in fitness that cause nat selection, The evolution of finches is proceeding slow/gradually
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6.
3 Fields that collaborate today to explain evolution.
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7.
Observ. by Grants: T/F Dif. in beak size=more imp. for survival during wet season, When food for finches was scarce, individuals with the largest beaks were less likely to survie
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8.
What does it mean for 2 species to be reproductively isolated from each other?
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9.
Why do mutations occur?
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10.
What is speciation?
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11.
If a trait made an organisms less likely to survive and reproduce, what would happen to the allele for that trait?
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12.
If a trait had no effect on an organisms fitness, what would happen to the alelle for that trait?
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13.
A collection of individuals of the same species in a given area is a _______________
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14.
What is disruptive selection?
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15.
Which 2 important factors was Darwin unable to explain without an understanding of heredity?
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16.
What does the Hardy-Weinberg principle state?
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17.
What is an example of the founder effect?
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18.
Why is large population size important in maintaining genetic equilibrium
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19.
3 Ways reproductive isolation occurs
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20.
What must happen in order for new species to evolve?
A.
true
B.
false/false
C.
2 populations are separated by geographic barriers such as rivers, mountains, or bodies of water
D.
The formation of new species
E.
Genetic drift has less effect on large populations
F.
1Founders arrive 2Separation of populations 3Changes in the gene pool 4Reproductive isolation 5Ecological competition 6Continue evolution
G.
because the mistakes in the replication of DNA or as a result of radiation or chemicals in the environment
H.
The evolution of several hundred species of fruit flies found on dif. Hawaiian Islands that descended from the same mainland population
I.
Members of 2 populations cannot interbreed and produce fertile offspring
J.
Individuals at the upper and lower ends of the curve have higher fitness than individuals near the middle
K.
1genetics 2molecular biology 3evolutionary theory
L.
He did not know the source of the variation that was so central to his theory. He could not explain how inheritable traits were passed from one generation to the next
M.
1behavioral 2geographic 3temporal
N.
Allele frequencies in a population will remain constant unless one or more factors cause those frequencies to change
O.
Populations become reproductively isolated from each other
P.
false
Q.
population
R.
true/false
S.
It would disappear from the gene pool completely or fewer copies of an allele would be passed down to future generations
T.
The allele that produces this trait will not be under pressure from natural selection, and its frequency will remain unchanged
Type the Answer that corresponds to the displayed Question.
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21.
An increase in the average size of beaks in Galapagos finches is an example of ________ selection
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22.
The combined gentic information of all members of a particular population is a ________________
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23.
Observ by Grants: T/F Big beaked birds tend to mate w/ small beaked birds, Average size beak increased dramatically
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24.
T/F Sexual reproduction can change the relative frequency of alleles in a population
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25.
T/F Natural selection is the only source of evolutionary change
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26.
T/F Individuals in dif species can have the same gene pool
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27.
T/F Mutations always affect an organisms fitness
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28.
A situation in which allele frequencies change as a result of the migration of a small subgroup of a population is known as the ____________
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29.
T/F Mutations always affect an organisms phenotype
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30.
Abert and Kaibab squirrels in the SW are an ex. of ___________ isolation

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