Cystic fibrosis (CF) is a disease caused by a mutation in a gene called the cystic fibrosis transmembrane conductance regulator (CFTR)
The mutation causes the afflicted individual to produce thick, sticky mucus that the cilia lining the respiratory tract can't easily remove. There is no cure for CF, and most individuals suffering from this condition die in their 20s or 30s.
Based on this scenario, what would you conclude about people who have CF?
A) They have excessive growth rates that result in gigantism.
B) They suffer from incessant coughing and chronic lung infections.
C) They have dangerously high blood pressure.
D) They have extremely thin skin that is easily damaged.
E) They have elevated oxygen levels in their blood.
B
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Mycorrhizae
a. benefit plant growth. b. are an example of mutualism. c. receives sugars from its plant partner. d. increase the surface area for absorption. e. are described by all of these
The roots of certain epiphytes are photosynthetic
____________________ Indicate whether the statement is true or false.
Distinguish between diurnal, nocturnal, and crepuscular animals, and provide an example of each. What will be an ideal response?
Which of the following methods could be used to identify the source of an outbreak?
a. DNA fingerprinting b. reverse genetics c. production of a recombinant protein d. artificial selection