C190 Pre-Assessment Question and
answers already passed 2026
Which item would be classified as biotic?
-light
-wind
-temperature
-fungus - correct answer ✔fungus
Which item is an atom?
-carbon dioxide
-nitrogen
-sucrose
-methane - correct answer ✔nitrogen
Largemouth bass have recently been introduced into ponds that previously did not contain any large,
predatory fish.
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 - correct 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.
If global climate change continues (as predicted) to increase the average temperature of habit - correct
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.
What is this an example of?
-sexual selection
-artificial selection
-gene flow
-genetic drift - correct 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.
, What evolutionary mechanism is involved in the change in the gene pool of this species?
-mutation
-gene flow
-genetic drift
-artificial selection - correct answer ✔mutation
The cladogram below depicts relationships between organisms:
Which two characteristics are found in organism C? Choose 2 answers.
-jaw
-fur
-dry skin
-lungs - correct answer ✔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 - correct answer ✔point E
answers already passed 2026
Which item would be classified as biotic?
-light
-wind
-temperature
-fungus - correct answer ✔fungus
Which item is an atom?
-carbon dioxide
-nitrogen
-sucrose
-methane - correct answer ✔nitrogen
Largemouth bass have recently been introduced into ponds that previously did not contain any large,
predatory fish.
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 - correct 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.
If global climate change continues (as predicted) to increase the average temperature of habit - correct
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.
What is this an example of?
-sexual selection
-artificial selection
-gene flow
-genetic drift - correct 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.
, What evolutionary mechanism is involved in the change in the gene pool of this species?
-mutation
-gene flow
-genetic drift
-artificial selection - correct answer ✔mutation
The cladogram below depicts relationships between organisms:
Which two characteristics are found in organism C? Choose 2 answers.
-jaw
-fur
-dry skin
-lungs - correct answer ✔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 - correct answer ✔point E
