Cystic fibrosis affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this?
A) incomplete dominance
B) multiple alleles
C) pleiotropy
D) epistasis
E) codominance
Answer: C
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What explains the coloration of giant kelp?
A. It facilitates absorption of the blue-green light prevalent in their environment. B. It facilitates absorption of the brown light prevalent in their environment. C. It warns grazers of their toxic properties. D. It camouflages them from grazers. E. It is the result of waste products stored in the tissues.
Skin cancer usually occurs in layer A, which is the __________, and is most often caused by
_____.
a. epidermis; UVA b. epidermis; UVB c. dermis; UVA d. dermis; UVB
The major phagocytic cells in the body are____
a. macrophages and lymphocytes b. macrophages and neutrophils c. macrophages and mast cells d. monocytes and mast cells e. monocytes and basophils
A true cellular nucleus is found in
A. bacteria. B. eukaryotic cells. C. blue-green algae. D. All of these answers are true.