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LSU BIOL 1202 (Pomarico) - Final
Exam Questions with Detailed
Verified Answers
What is not a good support of evolution? Ans: Fossils
Who placed fossils in an evolutionary context? Ans: Lamarck
________ traits can be passed along to the next generation Ans: Acquired
Adaptation by _________, not by individual Ans: Population
Survival is not usually random, but is largely dependent upon heritable traits
Ans: Survival of the Fittest
__________ picks the phenotypes that will survive Ans: Nature
The result of ___________ is the adaptation of organisms to their environment
Ans: Natural Selection
________ arise by chance Ans: Variations (Mutations)
What are the two requirements that are needed to insure that natural
selection occurs? Ans: 1. Excess of offspring
2. Variation in the population
_________ changes accumulated in each generation can result in major changes
over evolutionary time Ans: Small
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_________ are the oldest forms of life and also known as the simplest organisms
Ans: Prokaryotes
Structures that have similarity due to convergent evolution rather than to
descent from a common ancestor with the same traits Ans: Analogous
Structures
Structures that are similar because of common ancestry Ans: Homologous
Structures
Structures that look different but have the same function
EX: insect wing & bird wing Ans: Analogous Structures
Structures that look the same but have different functions
EX: cat arm & human arm Ans: Homologous Structures
The changing of an organism over time is supported by observations from
_____________ Ans: Artificial Selection
Selective breeding encourages ________ traits Ans: Desirable
What is a good example of artificial selection? Ans: Dogs
Who has the greatest fitness? Ans: Whoever has the most offspring
___________ are the smallest relevant evolutionary unit Ans: Populations
During __________ and __________ will not alter the overall genetic makeup of a
population Ans: Meiosis
Fertilization
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Will the segregation and recombination of alleles during meiosis and
fertilization alter the genetic makeup of a population? Ans: No
What are the 5 conditions needed to maintain the equilibrium (and stop
evolution from occurring)? Ans: 1. No mutations
2. No gene flow
3. Large population
4. Random mating
5. No natural selection
What is not a reason for genetic changes in individuals? Ans: Natural
Selection
What is the only new source of alleles? Ans: Mutations
________ can cause evolution by transferring alleles between populations Ans:
Gene Flow
________ is evolution by chance
EX: Flowers Ans: Genetic Drift
Only a smaller number of the population moves forward
EX: Disease wiping out 90% of the population Ans: Bottleneck Effect
A few individuals colonize a new habitat, so new forms of natural selection
occur due to new environmental pressures (such as genetic drift) Ans:
Founder Effect
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Direct competition among individuals of one sex (usually males) for mates of
the opposite sex Ans: Intrasexual Selection
Individuals of one sex (usually females) are choosy in selecting their mates
from individuals of the other sex (mate choice) Ans: Intersexual Selection
Which mode of natural selection shifts the population toward one extreme?
Ans: Directional
Which mode of natural selection shifts the population toward both extremes?
Ans: Disruptive
Which mode of natural selection reduces the phenotypic variation and
disfavors the two extremes? Ans: Stabilizing
In diploid individuals, who has an advantage?
EX: Sickle Cell Anemia/Malaria Ans: Heterozygous
Immigration IN of individuals into a population will not upset the equilibrium
if? Ans: They are beyond the age of reproduction
Two species of pine trees grow in the same habitat but release their pollen at
different times of the year. What kind of reproductive barrier is this? Ans:
Temporal (Pre-Zygotic)
Which of the following is a common first step in the process of allopatric
speciation? Ans: Geographic Isolation
Many species were originally distinguished by ___________ Ans: Morphology
What species category is distinguished by the ability to reproduce? Ans:
Biological
LSU BIOL 1202 (Pomarico) - Final
Exam Questions with Detailed
Verified Answers
What is not a good support of evolution? Ans: Fossils
Who placed fossils in an evolutionary context? Ans: Lamarck
________ traits can be passed along to the next generation Ans: Acquired
Adaptation by _________, not by individual Ans: Population
Survival is not usually random, but is largely dependent upon heritable traits
Ans: Survival of the Fittest
__________ picks the phenotypes that will survive Ans: Nature
The result of ___________ is the adaptation of organisms to their environment
Ans: Natural Selection
________ arise by chance Ans: Variations (Mutations)
What are the two requirements that are needed to insure that natural
selection occurs? Ans: 1. Excess of offspring
2. Variation in the population
_________ changes accumulated in each generation can result in major changes
over evolutionary time Ans: Small
,2|Page
_________ are the oldest forms of life and also known as the simplest organisms
Ans: Prokaryotes
Structures that have similarity due to convergent evolution rather than to
descent from a common ancestor with the same traits Ans: Analogous
Structures
Structures that are similar because of common ancestry Ans: Homologous
Structures
Structures that look different but have the same function
EX: insect wing & bird wing Ans: Analogous Structures
Structures that look the same but have different functions
EX: cat arm & human arm Ans: Homologous Structures
The changing of an organism over time is supported by observations from
_____________ Ans: Artificial Selection
Selective breeding encourages ________ traits Ans: Desirable
What is a good example of artificial selection? Ans: Dogs
Who has the greatest fitness? Ans: Whoever has the most offspring
___________ are the smallest relevant evolutionary unit Ans: Populations
During __________ and __________ will not alter the overall genetic makeup of a
population Ans: Meiosis
Fertilization
,3|Page
Will the segregation and recombination of alleles during meiosis and
fertilization alter the genetic makeup of a population? Ans: No
What are the 5 conditions needed to maintain the equilibrium (and stop
evolution from occurring)? Ans: 1. No mutations
2. No gene flow
3. Large population
4. Random mating
5. No natural selection
What is not a reason for genetic changes in individuals? Ans: Natural
Selection
What is the only new source of alleles? Ans: Mutations
________ can cause evolution by transferring alleles between populations Ans:
Gene Flow
________ is evolution by chance
EX: Flowers Ans: Genetic Drift
Only a smaller number of the population moves forward
EX: Disease wiping out 90% of the population Ans: Bottleneck Effect
A few individuals colonize a new habitat, so new forms of natural selection
occur due to new environmental pressures (such as genetic drift) Ans:
Founder Effect
, 4|Page
Direct competition among individuals of one sex (usually males) for mates of
the opposite sex Ans: Intrasexual Selection
Individuals of one sex (usually females) are choosy in selecting their mates
from individuals of the other sex (mate choice) Ans: Intersexual Selection
Which mode of natural selection shifts the population toward one extreme?
Ans: Directional
Which mode of natural selection shifts the population toward both extremes?
Ans: Disruptive
Which mode of natural selection reduces the phenotypic variation and
disfavors the two extremes? Ans: Stabilizing
In diploid individuals, who has an advantage?
EX: Sickle Cell Anemia/Malaria Ans: Heterozygous
Immigration IN of individuals into a population will not upset the equilibrium
if? Ans: They are beyond the age of reproduction
Two species of pine trees grow in the same habitat but release their pollen at
different times of the year. What kind of reproductive barrier is this? Ans:
Temporal (Pre-Zygotic)
Which of the following is a common first step in the process of allopatric
speciation? Ans: Geographic Isolation
Many species were originally distinguished by ___________ Ans: Morphology
What species category is distinguished by the ability to reproduce? Ans:
Biological
