BIOL 3410 EXAM 1 QUESTIONS WITH
ANSWERS 100% PASS
Evolution - ANSWER "Change over time"
Biological Evolution - ANSWER is any change in the inherited traits of a population that
occurs from one generation to the next
Microevolution - ANSWER A change in the frequencies of alleles in a population
(population thinking)
Macroevolution - ANSWER Evolution "above" the level of species (tree thinking)
Mutation - ANSWER Any change to the genomic sequence of an organism
Natural Selection - ANSWER Differential survival and reproduction of individuals cause
some genetic types to replace others, leading to evolution.
B - ANSWER Given how natural selection works through favoring certain traits and not
favoring others, how could a lineage or group ever go extinct?
A.Natural selection is an inherently flawed process in that it allows harmful mutations to
remain in the gene pool of species
,.B.The environment changes more quickly than natural selection can act on populations
to adapt.
C.Living things evolve to become better adapted to the environment, so they can also go
extinct to make way for new species.
D.Prey species are often driven to extinction by predation
Synapomorphy - ANSWER A derived form of a trait that is shared by a group of related
species
A - ANSWER Cetaceans
A.all originated from a single common ancestor within the past 50 million years.
B.originated from several different ancestral forms that each transitioned into aquatic
forms over the past 50 million years.
C.originated as a distinct mammalian lineage at the same time that other mammals
evolved, more than 200 million years ago.
D.have evolved multiple times over the past 100 million years.
, C - ANSWER Dolphins have the same set of genes that regulate the development of
hindlimbs that land mammals have. Why don't dolphins grow hindlimbs?
A.Dolphins do grow hindlimbs, but other add-on genes turn them into flippers.
B.Dolphins do not grow hindlimbs because they are not needed in an aquatic
environment.
C.Dolphin embryos do grow hindlimb buds, but their development is terminated very
early because of a mutation in a regulatory gene.
D.The regulatory genes for limb development in dolphins have been completely
deactivated.
Natural Selection - ANSWER Viral strains with beneficial mutation increase in frequency
through...
C - ANSWER Viral reassortment takes place when
A.viral particles insert their genes into the genome of a host cell.
B.one type of viral particle outcompetes another type outside their host cell.
ANSWERS 100% PASS
Evolution - ANSWER "Change over time"
Biological Evolution - ANSWER is any change in the inherited traits of a population that
occurs from one generation to the next
Microevolution - ANSWER A change in the frequencies of alleles in a population
(population thinking)
Macroevolution - ANSWER Evolution "above" the level of species (tree thinking)
Mutation - ANSWER Any change to the genomic sequence of an organism
Natural Selection - ANSWER Differential survival and reproduction of individuals cause
some genetic types to replace others, leading to evolution.
B - ANSWER Given how natural selection works through favoring certain traits and not
favoring others, how could a lineage or group ever go extinct?
A.Natural selection is an inherently flawed process in that it allows harmful mutations to
remain in the gene pool of species
,.B.The environment changes more quickly than natural selection can act on populations
to adapt.
C.Living things evolve to become better adapted to the environment, so they can also go
extinct to make way for new species.
D.Prey species are often driven to extinction by predation
Synapomorphy - ANSWER A derived form of a trait that is shared by a group of related
species
A - ANSWER Cetaceans
A.all originated from a single common ancestor within the past 50 million years.
B.originated from several different ancestral forms that each transitioned into aquatic
forms over the past 50 million years.
C.originated as a distinct mammalian lineage at the same time that other mammals
evolved, more than 200 million years ago.
D.have evolved multiple times over the past 100 million years.
, C - ANSWER Dolphins have the same set of genes that regulate the development of
hindlimbs that land mammals have. Why don't dolphins grow hindlimbs?
A.Dolphins do grow hindlimbs, but other add-on genes turn them into flippers.
B.Dolphins do not grow hindlimbs because they are not needed in an aquatic
environment.
C.Dolphin embryos do grow hindlimb buds, but their development is terminated very
early because of a mutation in a regulatory gene.
D.The regulatory genes for limb development in dolphins have been completely
deactivated.
Natural Selection - ANSWER Viral strains with beneficial mutation increase in frequency
through...
C - ANSWER Viral reassortment takes place when
A.viral particles insert their genes into the genome of a host cell.
B.one type of viral particle outcompetes another type outside their host cell.
