WELL DETAILED VERIFIED ANSWERS|GRADED A+|NEWEST
Which item is an atom?
-carbon dioxide
-nitrogen
-sucrose
-methane - ANSWER nitrogen
Which item would be classified as biotic?
-light
-wind
-temperature
-fungus - ANSWER fungus
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 metamor-
phosis 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 per-
centage 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.
1
,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.
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 pre-
dation 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
Male peacocks compete with one another to mate female peacocks. Males with more color-
ful 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 - 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.
2
, 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:
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 relationships between organisms:
Which two characteristics are found in organism C? Choose 2 answers.
-jaw
-fur
-dry skin
-lungs - ANSWER jaw & lungs
The cladogram below depicts the relationships between organisms:
3
Which item is an atom?
-carbon dioxide
-nitrogen
-sucrose
-methane - ANSWER nitrogen
Which item would be classified as biotic?
-light
-wind
-temperature
-fungus - ANSWER fungus
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 metamor-
phosis 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 per-
centage 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.
1
,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.
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 pre-
dation 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
Male peacocks compete with one another to mate female peacocks. Males with more color-
ful 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 - 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.
2
, 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:
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 relationships between organisms:
Which two characteristics are found in organism C? Choose 2 answers.
-jaw
-fur
-dry skin
-lungs - ANSWER jaw & lungs
The cladogram below depicts the relationships between organisms:
3
