SCIN130 Chapter 16 UPDATED ACTUAL
Questions and CORRECT Answers
Which of the following is/are an example(s) of a postzygotic isolating mechanism? -
CORRECT ANSWER✔✔- Hybrid sterility
Zygote mortality
Two different species attempt to reproduce, but their offspring is unable to undergo proper
mitosis because it has two different sets of chromosomes. This type of reproductive barrier is
best described as __________ mortality. - CORRECT ANSWER✔✔- zygote
The evolutionary history of a group of organisms is called _____. - CORRECT
ANSWER✔✔- phylogeny
When a horse and a donkey are mated, their offspring, a mule, is typically sterile. This is an
example of which of the following? - CORRECT ANSWER✔✔- Hybrid sterility
Some species appear suddenly in the fossil record and remain morphologically the same until
they go extinct. Based on this, paleontologists have developed the _____ equilibrium model. -
CORRECT ANSWER✔✔- punctuated
The model of evolution that describes the process as slow and continuous is called the _____
model. - CORRECT ANSWER✔✔- gradualistic
____ evolution occurs when two species evolve similar traits due to adaptation to their
environment, even though they are not related to each other. - CORRECT ANSWER✔✔-
Convergent
Similarity due to convergent evolution is called what? - CORRECT ANSWER✔✔- Analogy
A phylogenetic tree is a visual representation of which of the following? - CORRECT
ANSWER✔✔- Common ancestors and divergent lines of species
, During the course of evolution, when the process of speciation produces many new species
from a single ancestral species, this is called adaptive _____. - CORRECT ANSWER✔✔-
radiation
The process of speciation that involves a geographic barrier is called ____ speciation. -
CORRECT ANSWER✔✔- allopatric
Which of the following evidences led to the five-kingdom system being abandoned in favor
of the three-domain system? - CORRECT ANSWER✔✔- comparison of rRNA
cellular data
____ is the study of living organisms that relies on a combination of data from the fossil
record, comparative anatomy and development, and molecular data. - CORRECT
ANSWER✔✔- Systematics
Species with more DNA similarities are - CORRECT ANSWER✔✔- more closely related
Which of the following are evidence of the mass extinction of the Cretaceous period having
been caused when a meteorite crashed into the Earth? - CORRECT ANSWER✔✔-
Abnormally high levels of iridium in Cretaceous clay samples
A huge crater found in the Caribbean-Gulf of Mexico region
Anatomical or physiological differences between two species that prevent successful
reproduction after mating has taken place are called ____ isolating mechanisms. - CORRECT
ANSWER✔✔- postzygotic
A(n) ____ ancestor is one that has given rise to two or more lines of descent. - CORRECT
ANSWER✔✔- common
The two ____ in the diagram compare the gradualistic and punctuated equilibrium models of
evolution. - CORRECT ANSWER✔✔- evolutionary trees
Questions and CORRECT Answers
Which of the following is/are an example(s) of a postzygotic isolating mechanism? -
CORRECT ANSWER✔✔- Hybrid sterility
Zygote mortality
Two different species attempt to reproduce, but their offspring is unable to undergo proper
mitosis because it has two different sets of chromosomes. This type of reproductive barrier is
best described as __________ mortality. - CORRECT ANSWER✔✔- zygote
The evolutionary history of a group of organisms is called _____. - CORRECT
ANSWER✔✔- phylogeny
When a horse and a donkey are mated, their offspring, a mule, is typically sterile. This is an
example of which of the following? - CORRECT ANSWER✔✔- Hybrid sterility
Some species appear suddenly in the fossil record and remain morphologically the same until
they go extinct. Based on this, paleontologists have developed the _____ equilibrium model. -
CORRECT ANSWER✔✔- punctuated
The model of evolution that describes the process as slow and continuous is called the _____
model. - CORRECT ANSWER✔✔- gradualistic
____ evolution occurs when two species evolve similar traits due to adaptation to their
environment, even though they are not related to each other. - CORRECT ANSWER✔✔-
Convergent
Similarity due to convergent evolution is called what? - CORRECT ANSWER✔✔- Analogy
A phylogenetic tree is a visual representation of which of the following? - CORRECT
ANSWER✔✔- Common ancestors and divergent lines of species
, During the course of evolution, when the process of speciation produces many new species
from a single ancestral species, this is called adaptive _____. - CORRECT ANSWER✔✔-
radiation
The process of speciation that involves a geographic barrier is called ____ speciation. -
CORRECT ANSWER✔✔- allopatric
Which of the following evidences led to the five-kingdom system being abandoned in favor
of the three-domain system? - CORRECT ANSWER✔✔- comparison of rRNA
cellular data
____ is the study of living organisms that relies on a combination of data from the fossil
record, comparative anatomy and development, and molecular data. - CORRECT
ANSWER✔✔- Systematics
Species with more DNA similarities are - CORRECT ANSWER✔✔- more closely related
Which of the following are evidence of the mass extinction of the Cretaceous period having
been caused when a meteorite crashed into the Earth? - CORRECT ANSWER✔✔-
Abnormally high levels of iridium in Cretaceous clay samples
A huge crater found in the Caribbean-Gulf of Mexico region
Anatomical or physiological differences between two species that prevent successful
reproduction after mating has taken place are called ____ isolating mechanisms. - CORRECT
ANSWER✔✔- postzygotic
A(n) ____ ancestor is one that has given rise to two or more lines of descent. - CORRECT
ANSWER✔✔- common
The two ____ in the diagram compare the gradualistic and punctuated equilibrium models of
evolution. - CORRECT ANSWER✔✔- evolutionary trees
