A rigid cell wall made of chitin surrounds the cells of most fungi
1.True
2.False
1
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Sickle-cell anemia is a human disease that occurs as a result of what type of mutation in the b-globin gene?
A. silent B. missense C. nonsense D. frameshift E. sense
In a flowering plant life cycle, which of the
following structures are diploid?
a. megaspores b. male gametophytes c. eggs d. sporophytes e. none of these structures are diploid
Sickle-cell disease is a disorder that results in malformed hemoglobin molecules. What is the result of this in terms of hemoglobin function?
A. Hemoglobin has an increased ability to bind to and transport oxygen in red blood cells. B. White blood cells begin to pick up hemoglobin molecules instead and this decreases their ability to function in the immune system as intended. C. Hemoglobin has an increased ability to bind to and transport carbon dioxide in red blood cells. D. Hemoglobin has a reduced ability to bind to and transport oxygen in red blood cells.
Which structure prevents food from traveling down the trachea?
A) Pharynx B) Bronchus C) Glottis D) Epiglottis