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

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

2. Ocean acidification dissolves calcium-based exoskeletons of purple sea urchins. Some individuals have a trait making their exterior more acid-resistant. If acidification increases, how is this population most likely to evolve?

A) Less acid-resistant exoskeletons become more common
B) Longer, more rigid spines become more common
C) Shorter, more flexible spines become more common
D) Acid-resistant exoskeletons become more common

3. Chocolate is produced when yeasts, bacteria, and molds break down sugars in cacao beanswithout oxygen, yielding alcohols/acids and a small amount of ATP. Which metabolic process is occurring?

A) Aerobic respiration
B) Cellular respiration
C) Fermentation
D) Photosynthesis

4. During which stage of meiosis dohomologous pairsof chromosomesseparate from each other?

A) Metaphase I
B) Anaphase I
C) Anaphase II
D) Metaphase II

5.
Using theTetrapod Cladogram (Node E), the common ancestor at locationEgives rise to which two organisms?(Choose 2 answers)

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

Solutions: