Classification & Evolution Test Bank
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About This Quiz
This 'Classification & Evolution test bank' assesses understanding of species classification,
natural selection, and evolutionary processes. It includes questions on species interbreeding,
autotroph advantages, and survival traits in changing environments, relevant for students
studying biological evolution.
Questions and Answers
1/30 Questions
• When comparing 2 populations of animals, which statement most likely indicates that
they are the same species?
o They produce fertile offspring.
o They inhabit the same general area.
o Their outward appearance is similar.
o They consume the same type of diet.
• 2.
What characteristic of early autotrophs gave them an advantage over early heterotrophs?
o They ate heterotrophs.
o They produced spores.
o They made their own food.
, o They reproduced asexually.
Correct Answer
A. They made their own food.
Explanation
Early autotrophs had an advantage over early heterotrophs because they were capable of
producing their own food through photosynthesis or chemosynthesis. This ability allowed them
to synthesize organic molecules, such as glucose, using energy from sunlight or inorganic
compounds. In contrast, early heterotrophs relied on consuming other organisms or organic
matter for their energy and nutrient requirements. By being able to produce their own food,
autotrophs were not dependent on finding and consuming other organisms, which provided
them with a competitive advantage in environments where resources were limited.
• 3.
Which example best illustrates the process of natural selection?
o Giraffe necks varied in length, and all offspring had an equal chance of survival.
o Giraffe necks varied in length, and the shorter-necked giraffes were at a
disadvantage.
o Giraffes with short necks migrated to locations best suited for their neck lengths.
o Giraffes stretched their necks to reach for food, and resulting offspring had
longer necks.
Correct Answer
A. Giraffe necks varied in length, and the shorter-necked giraffes were at a disadvantage.
Explanation
The example that best illustrates the process of natural selection is when giraffe necks varied in
length, and the shorter-necked giraffes were at a disadvantage. This is because natural selection
involves the survival and reproduction of individuals with traits that are better suited to their
environment. In this case, the giraffes with shorter necks are less able to reach food and
therefore have a lower chance of survival and reproduction compared to giraffes with longer
necks. Over time, this leads to the prevalence of longer-necked giraffes in the population, as
they have a higher chance of passing on their genes.
, • 4.
Most male crickets produce a mating song by rubbing together their curved wings. In a certain
geographic area, parasitic flies detected male crickets singing and deposited their larvae into
them, which killed the crickets. Eighteen generations later, the number of males with flat wings
has increased to 90%. The flat-winged crickets do not sing, but are still able to mate with
females, and parasitic flies cannot detect them. Which type of selection is occurring in this
cricket population?
o Artificial
o Directional
o Disruptive
o Stabilizing
Correct Answer
A. Directional
Explanation
Directional selection is occurring in this cricket population. Directional selection happens when
individuals with a particular trait have a higher fitness and are favored by natural selection,
leading to a shift in the population towards that trait. In this case, the presence of parasitic flies
has caused a shift in the population towards flat-winged crickets that do not sing. These crickets
have a higher fitness because they are not detected by the flies and are able to mate with
females. As a result, the number of males with flat wings has increased to 90% over the course
of 18 generations.
:
• 5.
Horse skeleton fossils indicate that the size of horses increased over time. Which statement best
explains this fossil record?
o Smaller horses bred with larger horses, creating hybrids.
o Smaller horses were infected by a fatal virus early in their history.
o Larger horses consumed the food supply of the smaller horses.
o Larger horses produced a slightly greater number of surviving offspring.
Start
About This Quiz
This 'Classification & Evolution test bank' assesses understanding of species classification,
natural selection, and evolutionary processes. It includes questions on species interbreeding,
autotroph advantages, and survival traits in changing environments, relevant for students
studying biological evolution.
Questions and Answers
1/30 Questions
• When comparing 2 populations of animals, which statement most likely indicates that
they are the same species?
o They produce fertile offspring.
o They inhabit the same general area.
o Their outward appearance is similar.
o They consume the same type of diet.
• 2.
What characteristic of early autotrophs gave them an advantage over early heterotrophs?
o They ate heterotrophs.
o They produced spores.
o They made their own food.
, o They reproduced asexually.
Correct Answer
A. They made their own food.
Explanation
Early autotrophs had an advantage over early heterotrophs because they were capable of
producing their own food through photosynthesis or chemosynthesis. This ability allowed them
to synthesize organic molecules, such as glucose, using energy from sunlight or inorganic
compounds. In contrast, early heterotrophs relied on consuming other organisms or organic
matter for their energy and nutrient requirements. By being able to produce their own food,
autotrophs were not dependent on finding and consuming other organisms, which provided
them with a competitive advantage in environments where resources were limited.
• 3.
Which example best illustrates the process of natural selection?
o Giraffe necks varied in length, and all offspring had an equal chance of survival.
o Giraffe necks varied in length, and the shorter-necked giraffes were at a
disadvantage.
o Giraffes with short necks migrated to locations best suited for their neck lengths.
o Giraffes stretched their necks to reach for food, and resulting offspring had
longer necks.
Correct Answer
A. Giraffe necks varied in length, and the shorter-necked giraffes were at a disadvantage.
Explanation
The example that best illustrates the process of natural selection is when giraffe necks varied in
length, and the shorter-necked giraffes were at a disadvantage. This is because natural selection
involves the survival and reproduction of individuals with traits that are better suited to their
environment. In this case, the giraffes with shorter necks are less able to reach food and
therefore have a lower chance of survival and reproduction compared to giraffes with longer
necks. Over time, this leads to the prevalence of longer-necked giraffes in the population, as
they have a higher chance of passing on their genes.
, • 4.
Most male crickets produce a mating song by rubbing together their curved wings. In a certain
geographic area, parasitic flies detected male crickets singing and deposited their larvae into
them, which killed the crickets. Eighteen generations later, the number of males with flat wings
has increased to 90%. The flat-winged crickets do not sing, but are still able to mate with
females, and parasitic flies cannot detect them. Which type of selection is occurring in this
cricket population?
o Artificial
o Directional
o Disruptive
o Stabilizing
Correct Answer
A. Directional
Explanation
Directional selection is occurring in this cricket population. Directional selection happens when
individuals with a particular trait have a higher fitness and are favored by natural selection,
leading to a shift in the population towards that trait. In this case, the presence of parasitic flies
has caused a shift in the population towards flat-winged crickets that do not sing. These crickets
have a higher fitness because they are not detected by the flies and are able to mate with
females. As a result, the number of males with flat wings has increased to 90% over the course
of 18 generations.
:
• 5.
Horse skeleton fossils indicate that the size of horses increased over time. Which statement best
explains this fossil record?
o Smaller horses bred with larger horses, creating hybrids.
o Smaller horses were infected by a fatal virus early in their history.
o Larger horses consumed the food supply of the smaller horses.
o Larger horses produced a slightly greater number of surviving offspring.
