BIO 152 EXAM 1 WITH CORRECT
ANSWERS 2025
A trait that is inherited from a common ancestor. correct
answers >> Homologous
A trait that performs a similar function in a highly unrelated
species. correct answers >> Analogous
A shared ancestral trait. correct answers >>
Symplesiomorphy
An ancestral trait that has been dramatically reduced and is no
longer functional. correct answers >> Vestigial
A trait that has evolved independently in different species.
correct answers >> Convergent evolution
A shared derived trait, usually used to determine relationships
between organisms on a phylogeny. correct answers >>
Synapomorphy
A unique derived trait, not used to determine relationships among
organisms on a phylogeny. correct answers >>
Autapomorphy
,Gametic incompatibility is a type of post-zygotic isolation
mechanism.
(true or false) correct answers >> FALSE
Allopatric speciation happens when populations are separated by
a vicariant
event, or a geological feature and gene flow stops.(true or false)
correct answers >> TRUE
Natural selection acts on populations, not individuals.(true or
false) correct answers >> FALSE
Mutation is the ultimate source of all variation.(true or false)
correct answers >> TRUE
A desert is defined as an arid environment that receives 250
mm/y precipitation or less(true or false) correct answers >>
TRUE
Natural selection occurs in populations that have no genetic
variation.(true or false) correct answers >> FALSE
Genetic bottlenecks occur because of natural selection.(true or
false) correct answers >> FALSE
Individuals adapt to their environment through natural selection.
(true or false) correct answers >> FALSE
, The founder effect is an example of gene flow.(true or false)
correct answers >> FALSE
Genetic drift is more likely to affect small populations rather than
large
populations.(true or false) correct answers >> TRUE
Of the following anatomical structures, which is homologous to
the bones in the wing of a bird?
A) Cartilage in the dorsal fin of a shark
B) Bones in the hind limb of a kangaroo
C) Chitinous struts in the wing of a butterfly
D) Bony rays in the tail fit of a flying fish
E) Bones in the flipper of a whale correct answers >>
E.Bones in the flipper of a whale
Genetic drift occurs in a population. Which of the following
statements might be true.
A) Genetic drift increased the population's fitness.
B) Genetic drift decreased the population's fitness.
C) The population was relatively small
D) The population experiences a decrease in genetic variation.
E) Any of the statements can be true. correct answers >> E)
Any of the statements can be true.
ANSWERS 2025
A trait that is inherited from a common ancestor. correct
answers >> Homologous
A trait that performs a similar function in a highly unrelated
species. correct answers >> Analogous
A shared ancestral trait. correct answers >>
Symplesiomorphy
An ancestral trait that has been dramatically reduced and is no
longer functional. correct answers >> Vestigial
A trait that has evolved independently in different species.
correct answers >> Convergent evolution
A shared derived trait, usually used to determine relationships
between organisms on a phylogeny. correct answers >>
Synapomorphy
A unique derived trait, not used to determine relationships among
organisms on a phylogeny. correct answers >>
Autapomorphy
,Gametic incompatibility is a type of post-zygotic isolation
mechanism.
(true or false) correct answers >> FALSE
Allopatric speciation happens when populations are separated by
a vicariant
event, or a geological feature and gene flow stops.(true or false)
correct answers >> TRUE
Natural selection acts on populations, not individuals.(true or
false) correct answers >> FALSE
Mutation is the ultimate source of all variation.(true or false)
correct answers >> TRUE
A desert is defined as an arid environment that receives 250
mm/y precipitation or less(true or false) correct answers >>
TRUE
Natural selection occurs in populations that have no genetic
variation.(true or false) correct answers >> FALSE
Genetic bottlenecks occur because of natural selection.(true or
false) correct answers >> FALSE
Individuals adapt to their environment through natural selection.
(true or false) correct answers >> FALSE
, The founder effect is an example of gene flow.(true or false)
correct answers >> FALSE
Genetic drift is more likely to affect small populations rather than
large
populations.(true or false) correct answers >> TRUE
Of the following anatomical structures, which is homologous to
the bones in the wing of a bird?
A) Cartilage in the dorsal fin of a shark
B) Bones in the hind limb of a kangaroo
C) Chitinous struts in the wing of a butterfly
D) Bony rays in the tail fit of a flying fish
E) Bones in the flipper of a whale correct answers >>
E.Bones in the flipper of a whale
Genetic drift occurs in a population. Which of the following
statements might be true.
A) Genetic drift increased the population's fitness.
B) Genetic drift decreased the population's fitness.
C) The population was relatively small
D) The population experiences a decrease in genetic variation.
E) Any of the statements can be true. correct answers >> E)
Any of the statements can be true.
