WGUC190 Pre-Assessment Exam Questions and Answers with
Verified Solutions | Latest 2026 Update
Q: Which item would be classified as biotic?
-light
-wind
-temperature
-fungus
Answer:
fungus
Q: Which item is an atom?
-carbon dioxide
-nitrogen
-sucrose
-methane
Answer:
nitrogen
Largemouth bass have recently been introduced into ponds that previously did not
contain any large, predatory fish.
Q: 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
Answer:
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.
Q: If global climate change continues (as predicted) to increase the average
temperature of habit
Answer:
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.
Q: What is this an example of?
-sexual selection
-artificial selection
-gene flow
-genetic drift
Answer:
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.
Q: What evolutionary mechanism is involved in the change in the gene pool of
this species?
-mutation
-gene flow
-genetic drift
, -artificial selection
Answer:
mutation
The cladogram below depicts relationships between organisms:
Which two characteristics are found in organism C? Choose 2 answers.
-jaw
-fur
-dry skin
Q: -lungs
Answer:
jaw & lungs
The cladogram below depicts relationships between organisms:
Q: 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
Answer:
point E
The cladogram below depicts the relationships between organisms:
Q: Which organism has neither bones nor a jaw?
-shark
-lamprey
-fish
-frog
Answer:
lamprey
Refer to the following cladogram to answer the question.
Which two organisms have eggs with shells? Choose 2 answers
-crocodilians
-rodents
Verified Solutions | Latest 2026 Update
Q: Which item would be classified as biotic?
-light
-wind
-temperature
-fungus
Answer:
fungus
Q: Which item is an atom?
-carbon dioxide
-nitrogen
-sucrose
-methane
Answer:
nitrogen
Largemouth bass have recently been introduced into ponds that previously did not
contain any large, predatory fish.
Q: 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
Answer:
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.
Q: If global climate change continues (as predicted) to increase the average
temperature of habit
Answer:
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.
Q: What is this an example of?
-sexual selection
-artificial selection
-gene flow
-genetic drift
Answer:
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.
Q: What evolutionary mechanism is involved in the change in the gene pool of
this species?
-mutation
-gene flow
-genetic drift
, -artificial selection
Answer:
mutation
The cladogram below depicts relationships between organisms:
Which two characteristics are found in organism C? Choose 2 answers.
-jaw
-fur
-dry skin
Q: -lungs
Answer:
jaw & lungs
The cladogram below depicts relationships between organisms:
Q: 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
Answer:
point E
The cladogram below depicts the relationships between organisms:
Q: Which organism has neither bones nor a jaw?
-shark
-lamprey
-fish
-frog
Answer:
lamprey
Refer to the following cladogram to answer the question.
Which two organisms have eggs with shells? Choose 2 answers
-crocodilians
-rodents
