Which of the following statements about stem cells is NOT accurate?
A. Some stem cells can only differentiate into one cell type.
B. Different types of stem cells vary in their potency.
C. Some stem cells can differentiate into more than one type of specialized cell.
D. Stem cells can undergo mitosis.
E. Stem cells are only found in embryos.
Answer: E
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A bacterium that normally colonizes the skin gains access through a laceration and causes infection. This type of infection is classified as:
a. nosocomial. b. opportunistic. c. nonpathogenic. d. immunogenic.
UV radiation on the skin can cause ________ .
a. vitiligo b. benign melanoma c . squamous cell carcinoma d. acne e. cold sores
Biologic agents are:
A) synthetically manufactured and weaponized by mixing the synthetic component with an organism. B) least preferred by terrorists because they are difficult to disseminate over a large population. C) the ideal weapons of mass destruction if the terrorist's objective is to affect a small geographic area. D) naturally occurring organisms that are cultivated in a laboratory.
When a T cell's CD95L binds to the CD95 on a target cell, antibodies are formed.
Answer the following statement true (T) or false (F)