Exam-UConn Bio 1108 Final Exam Quiz and Lecture
Questions with Solutions
Which one of the following is a selective advantage of simple multicellularity over single-
celled
organisms? CORRECT ANS-Multicellularity helps organisms avoid predation.
Which one of the following organisms has coenocytic organization? CORRECT ANS-some
green algae
Why do mitochondria and chloroplasts have small genome? CORRECT ANS-They have
small genomes because over time, much of their nucleic acid has migrated to the host cell
nucleus.
Some slime molds make structures called plasmodia which: CORRECT ANS-contain many
nuclei in one large cell.
Chloroplasts have outer and an inner membranes that separate the stroma and thylakoids
from the
, Exam-UConn Bio 1108 Final Exam Quiz and Lecture
Questions with Solutions
cytoplasm. What is believed to be the origin of the outer membrane of the chloroplast?
CORRECT ANS-It is the remnant of the ancient host cell's plasma membrane following
endocytosis of the
cyanobacteria.
The peppered moth provides a well-known example of natural selection. The lightcolored
form of the moth was predominant in England before the industrial revolution. In
the mid-nineteenth century, a dark-colored form appeared. The difference is produced by
a dominant allele of one gene. By about 1900, approximately 90% of the moths around
industrial areas were dark colored, whereas light-colored moths were still abundant
elsewhere. Apparently, birds could readily find the light moths against the soot-darkened
background in industrial areas and therefore were eating more light moths. Recently, use
of cleaner fuels has greatly reduced soot in the landscape, and the dark-colored moths
have been disappearing. Should the two forms of moths be considered separate species?
CORRECT ANS-No
Three populations of crickets look very similar, but the males have courtship songs that
, Exam-UConn Bio 1108 Final Exam Quiz and Lecture
Questions with Solutions
sound different. What function would this difference in song likely serve if the
populations came in contact? CORRECT ANS-a prezygotic isolating mechanism
How are two different species most likely to evolve from one ancestral species? CORRECT
ANS-allopatrically, after the ancestral species has split into two populations
polytomy is a graphical depiction of what type of relationship between groups? CORRECT
ANS-The common ancestor node with no resolution among descendant groups.
One reason we see relatively little genetic variation among human regional populations
is that: CORRECT ANS-humans migrated out of Africa so recently that we haven't had
enough time
for regional variation to accumulate
The term "n" refers to the size of a population, that is, the number
of individuals in that population. In general, in a sample of n
Questions with Solutions
Which one of the following is a selective advantage of simple multicellularity over single-
celled
organisms? CORRECT ANS-Multicellularity helps organisms avoid predation.
Which one of the following organisms has coenocytic organization? CORRECT ANS-some
green algae
Why do mitochondria and chloroplasts have small genome? CORRECT ANS-They have
small genomes because over time, much of their nucleic acid has migrated to the host cell
nucleus.
Some slime molds make structures called plasmodia which: CORRECT ANS-contain many
nuclei in one large cell.
Chloroplasts have outer and an inner membranes that separate the stroma and thylakoids
from the
, Exam-UConn Bio 1108 Final Exam Quiz and Lecture
Questions with Solutions
cytoplasm. What is believed to be the origin of the outer membrane of the chloroplast?
CORRECT ANS-It is the remnant of the ancient host cell's plasma membrane following
endocytosis of the
cyanobacteria.
The peppered moth provides a well-known example of natural selection. The lightcolored
form of the moth was predominant in England before the industrial revolution. In
the mid-nineteenth century, a dark-colored form appeared. The difference is produced by
a dominant allele of one gene. By about 1900, approximately 90% of the moths around
industrial areas were dark colored, whereas light-colored moths were still abundant
elsewhere. Apparently, birds could readily find the light moths against the soot-darkened
background in industrial areas and therefore were eating more light moths. Recently, use
of cleaner fuels has greatly reduced soot in the landscape, and the dark-colored moths
have been disappearing. Should the two forms of moths be considered separate species?
CORRECT ANS-No
Three populations of crickets look very similar, but the males have courtship songs that
, Exam-UConn Bio 1108 Final Exam Quiz and Lecture
Questions with Solutions
sound different. What function would this difference in song likely serve if the
populations came in contact? CORRECT ANS-a prezygotic isolating mechanism
How are two different species most likely to evolve from one ancestral species? CORRECT
ANS-allopatrically, after the ancestral species has split into two populations
polytomy is a graphical depiction of what type of relationship between groups? CORRECT
ANS-The common ancestor node with no resolution among descendant groups.
One reason we see relatively little genetic variation among human regional populations
is that: CORRECT ANS-humans migrated out of Africa so recently that we haven't had
enough time
for regional variation to accumulate
The term "n" refers to the size of a population, that is, the number
of individuals in that population. In general, in a sample of n
