Hematopoietic stem cells (HSCs) are particularly useful in gene therapy because ________
A) they are short lived in vitro
B) they differentiate into all tissue types
C) they are easy to obtain from patients
D) they are useable across many patients without rejection fears
Answer: C
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Each of the following contributes to emerging drug resistance except
A. multiple drug therapy. B. addition of antibiotics to common household products. C. ingestion of antibiotics with animal feed. D. overuse of antibiotics. E. improper use of antibiotics.
When tissues organize, what do they form?
a. a cell b. a nucleus c. an atom d. an organ e. an enzyme
Which organisms may be a keystone species in a tropical rain forest?
a. gray wolves b. fruit-eating bats c. poison arrow frogs d. fig trees e. fruit-eating monkeys
Wood frogs freeze solid during the winter and then thaw in the spring. As the freezing progresses, blood circulation stops. How would you expect cells not being served by the circulatory system to produce ATP during this time, and what by-product would
you expect to build up in the cells? A) aerobic respiration and CO2 B) fermentation and lactate C) fermentation and alcohol D) photosynthesis and O2