Stem cells
A. have an almost unlimited capacity to divide.
B. can differentiate into different tissues.
C. may be used to test the effects of drugs on human cells.
D. come from fetal material.
E. All of the above
E.
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A bacteriophage that can integrate its genome into the host chromosome and not cause lysis of the host cell is said to be ________.
A. moderate B. temperate C. virulent D. avirulent
Losing a pound of fat requires expending about
a. 1500 kcal. b. 2000 kcal. c. 2500 kcal. d. 3000 kcal. e. 3500 kcal.
Gregor Mendel ____
a. discovered the structure of DNA b. claimed that each individual carries a pair of "factors" for a given trait c. demonstrated that traits carried by parents are “blended” in their offspring d. cross-bred thirty different species of pea plants over a span of fifty years e. reasoned that each parent carries one gene for a specific trait
What two forces control the movement of fluid through the capillary wall?
A. the oxygen and nitrogen concentration B. the thickness of the capillary wall and the number of cilia C. blood pressure and osmotic pressure D. the number of veins and arteries