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C190 Pre-Assessment Questions with Detailed
Verified Answers
Which item would be classified as biotic?
-light
-wind
-temperature
-fungus Ans: fungus
Which item is an atom?
-carbon dioxide
-nitrogen
-sucrose
-methane Ans: nitrogen
Largemouth bass have recently been introduced into ponds that
previously did not contain any large, predatory fish.
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Which adaptation would help the existing population of small, prey
species of fish avoid predation from the largemouth bass?
-fins with smaller surface areas
-faster average swim speed
-more noticeable body coloration
-more time actively foraging for food each day Ans: faster average
swim speed
Western spadefoot toads breed and deposit their fertilized eggs in small,
often short-lived ponds. The tadpoles grow in the ponds for a period of
time before undergoing a metamorphosis into an adult frog. One unusual
characteristic of spadefoot tadpoles is the ability to change body form
during development. Normally most tadpoles are herbivorous and feed on
plant material. However, when conditions in the ponds suggest they are
beginning to dry up (e.g., an increase in water temperature or
concentration of organic waste), a small percentage of individuals in the
population undergo a dramatic change in body form and habit and begin
to eat their competitors. This ability is considered to be advantageous as
it both reduces the number of competitors in the pond and speeds up the
rate of development of the transformed tadpoles.
If global climate change continues (as predicted) to increase the average
temperature of habit Ans: Spadefoot toads would likely evolve to have
a higher percentage of toads become carnivorous.
Male peacocks compete with one another to mate female peacocks. Males
with more colorful tail feathers attract female mates at a higher rate than
those without. Therefore, male peacocks have colorful tail feathers,
whereas female peacocks do not.
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What is this an example of?
-sexual selection
-artificial selection
-gene flow
-genetic drift Ans: sexual selection
A gardener maintains a species of rose that produce either yellow flowers
(the dominant phenotype) or white flowers (the recessive phenotype).
One day, the gardener observes that a cross between two yellow rose
bushes has led to a single rose bush with orange flowers.
What evolutionary mechanism is involved in the change in the gene pool
of this species?
-mutation
-gene flow
-genetic drift
-artificial selection Ans: mutation
The cladogram below depicts relationships between organisms:
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Which two characteristics are found in organism C? Choose 2 answers.
-jaw
-fur
-dry skin
-lungs Ans: jaw & lungs
The cladogram below depicts relationships between organisms:
Where is the ancestor of wolves and gorillas, but not frogs, depicted on
this cladogram?
-point D
-point E
-between points E and F
-between points C and D Ans: point E
The cladogram below depicts the relationships between organisms:
Which organism has neither bones nor a jaw?
-shark
C190 Pre-Assessment Questions with Detailed
Verified Answers
Which item would be classified as biotic?
-light
-wind
-temperature
-fungus Ans: fungus
Which item is an atom?
-carbon dioxide
-nitrogen
-sucrose
-methane Ans: nitrogen
Largemouth bass have recently been introduced into ponds that
previously did not contain any large, predatory fish.
, Page | 2
Which adaptation would help the existing population of small, prey
species of fish avoid predation from the largemouth bass?
-fins with smaller surface areas
-faster average swim speed
-more noticeable body coloration
-more time actively foraging for food each day Ans: faster average
swim speed
Western spadefoot toads breed and deposit their fertilized eggs in small,
often short-lived ponds. The tadpoles grow in the ponds for a period of
time before undergoing a metamorphosis into an adult frog. One unusual
characteristic of spadefoot tadpoles is the ability to change body form
during development. Normally most tadpoles are herbivorous and feed on
plant material. However, when conditions in the ponds suggest they are
beginning to dry up (e.g., an increase in water temperature or
concentration of organic waste), a small percentage of individuals in the
population undergo a dramatic change in body form and habit and begin
to eat their competitors. This ability is considered to be advantageous as
it both reduces the number of competitors in the pond and speeds up the
rate of development of the transformed tadpoles.
If global climate change continues (as predicted) to increase the average
temperature of habit Ans: Spadefoot toads would likely evolve to have
a higher percentage of toads become carnivorous.
Male peacocks compete with one another to mate female peacocks. Males
with more colorful tail feathers attract female mates at a higher rate than
those without. Therefore, male peacocks have colorful tail feathers,
whereas female peacocks do not.
, Page | 3
What is this an example of?
-sexual selection
-artificial selection
-gene flow
-genetic drift Ans: sexual selection
A gardener maintains a species of rose that produce either yellow flowers
(the dominant phenotype) or white flowers (the recessive phenotype).
One day, the gardener observes that a cross between two yellow rose
bushes has led to a single rose bush with orange flowers.
What evolutionary mechanism is involved in the change in the gene pool
of this species?
-mutation
-gene flow
-genetic drift
-artificial selection Ans: mutation
The cladogram below depicts relationships between organisms:
, Page | 4
Which two characteristics are found in organism C? Choose 2 answers.
-jaw
-fur
-dry skin
-lungs Ans: jaw & lungs
The cladogram below depicts relationships between organisms:
Where is the ancestor of wolves and gorillas, but not frogs, depicted on
this cladogram?
-point D
-point E
-between points E and F
-between points C and D Ans: point E
The cladogram below depicts the relationships between organisms:
Which organism has neither bones nor a jaw?
-shark
