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WGU Introduction-to-Biology Exam Syllabus Topics:

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

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

2. 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) White : Pink : Red
C) Pink : Red : White
D) Red : Pink : White

3. A researcher studies an organism with these traits:~0.3 #msize, cell membrane enclosing contents,free ribosomesin cytoplasm, andgenetic material loosely distributedin the cytoplasm. Which statement is true?

A) It is a eukaryote because it contains ribosomes.
B) It is a prokaryote because it is microscopic.
C) It is a prokaryote because it lacks a nucleus.
D) It is a eukaryote with both a cell membrane and cell wall.

4. Which organisms arefour-limbed, produceshelled eggs, andlack feathers?

A) Amphibians
B) Crocodilians
C) Sharks and rays
D) Rodents and rabbits

5. Which molecule is aninputto thelight-dependent reactionsof photosynthesis?

A) Water
B) Sugar
C) Carbon dioxide
D) Oxygen

Solutions: