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WGU Introduction-to-Biology Exam Syllabus Topics:

WGU Introduction to Biology (KBC1, C190) Sample Questions:

Question 1

A horticulturalist crosses twopinkcarnations. Flower color showsincomplete dominance: red × white # pink heterozygotes. The observedphenotype ratio is 2:1:1. Which color ordering corresponds to this ratio?

A. White : Red : Pink
B. Red : Pink : White
C. White : Pink : Red
D. Pink : Red : White

Question 2

How isDNA organized during prophase, and why?

A. Uncondensed because it needs to be lined up at the center
B. Uncondensed because it needs to move toward the poles
C. Organized into paired chromatids to keep it lined up at the center
D. Condensed, which makes it easier to move

Question 3

Using theTetrapod Cladogram (Node E), the common ancestor at locationEgives rise to which two organisms?(Choose 2 answers)

A. Gorilla
B. Tiger
C. Salamander
D. Lizard

Question 4

What is thefunction of the centromereduring M phase?

A. Keeping chromosomes condensed and packaged during cell division
B. Pushing each sister chromatid to one of the poles
C. Copying the chromosomes
D. Holding sister chromatids together until they separate to move to opposite poles

Question 5

The Mojave Desert is hot and dry. Roadrunners (endothermic, ground-dwelling birds) already have adaptations that reduce daytime heat gain. If average temperatures rise as predicted, how is theirplumagemost likely to change under natural selection?

A. Become lighter to increase reflection of heat
B. Become darker to absorb more environmental heat
C. Become thicker to trap more heat
D. Become longer to increase heat absorption

Solutions: