Which is an example of gene therapy?
A) replacing a failing heart with a new heart from a genetically matched donor
B) injecting human factor VIII protein into hemophiliacs with a defective factor VIII gene
C) infecting a cystic fibrosis patient with a virus carrying a working copy of the cystic fibrosis gene
D) providing therapeutic drugs to a patient experiencing high blood pressure
C
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Which of the following statements about the physiological responses of plants to increasing temperatures and carbon dioxide levels is false?
A. Many plants devote more resources to reproduction under these conditions. B. Many plants produce flowers earlier in response to increased temperatures. C. Many plants produce leaves earlier in response to increased temperatures. D. The amount of nitrogen in plant tissues declines in response to increased CO2. E. None of the answer options is false.
Immovable joints such as those found between bones of the skull are ________ joints
Fill in the blank(s) with correct word
Occasional errors occur during meiosis, resulting in gametes that have too many or too few chromosomes. Such errors in meiosis, called ________, can affect the number of sex chromosomes or autosomes in a gamete
Fill in the blank(s) with correct word
Plasma cells release ________ that attach to an invading microbe, marking it for destruction.
A. interleukin-2 B. perforin molecules C. histamine D. antibodies