WGU C190 Introduction to Biology Pre-Assessment
71 Questions with Verified Answers
Jaw and Lungs - CORRECT ANSWER Which two characteristics are found in
organism C? Choose two answers.
Point E - CORRECT ANSWER Where is the ancestor of wolves and gorillas, but not
frogs, depicted on this cladogram?
Lamprey - CORRECT ANSWER Which organism has neither bones nor a jaw?
Birds ; Crocodilians - CORRECT ANSWER Which two organisms have eggs with
shells?
Rodents and rabbits; Primates - CORRECT ANSWER Which organisms have four
limbs and produce amniotic eggs without shells?
D - CORRECT ANSWER Which species on the following cladogram has the most
similar DNA sequence to species E?
Faster average swim speed - CORRECT ANSWER 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?
, Spadefoot toads would likely evolve to have a higher percentage of toads become
carnivorous. - CORRECT ANSWER 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 habitats
Sexual selection - CORRECT ANSWER 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?
Mutation - CORRECT ANSWER 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?
Fungus - CORRECT ANSWER Which item would be classified as biotic?
Nitrogen - CORRECT ANSWER Which item is an atom?
71 Questions with Verified Answers
Jaw and Lungs - CORRECT ANSWER Which two characteristics are found in
organism C? Choose two answers.
Point E - CORRECT ANSWER Where is the ancestor of wolves and gorillas, but not
frogs, depicted on this cladogram?
Lamprey - CORRECT ANSWER Which organism has neither bones nor a jaw?
Birds ; Crocodilians - CORRECT ANSWER Which two organisms have eggs with
shells?
Rodents and rabbits; Primates - CORRECT ANSWER Which organisms have four
limbs and produce amniotic eggs without shells?
D - CORRECT ANSWER Which species on the following cladogram has the most
similar DNA sequence to species E?
Faster average swim speed - CORRECT ANSWER 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?
, Spadefoot toads would likely evolve to have a higher percentage of toads become
carnivorous. - CORRECT ANSWER 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 habitats
Sexual selection - CORRECT ANSWER 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?
Mutation - CORRECT ANSWER 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?
Fungus - CORRECT ANSWER Which item would be classified as biotic?
Nitrogen - CORRECT ANSWER Which item is an atom?
