Clonal deletion that removes lymphocytes that recognize any self antigens that are present is known as ________.
A. neutralization
B. positive selection
C. negative selection
D. None of the choices are correct.
Answer: C
You might also like to view...
A distinguishing characteristic of actinomycetes that can be used to classify these organisms is the types of sugars found in extracts of the organisms.
Answer the following statement true (T) or false (F)
Earth is essentially a closed system with respect to ____
a. energy b. matter c. oxygen d. photosynthesis e. ecosystems
Which feature is shared by euglenoids and kinetoplastids?
a. an eyespot b. flagellated c. photoautotrophy d. parasitic existence e. marine and freshwater habitats
Fetuses may be treated in utero by all of the following, EXCEPT
A. Experimental Fetal Surgery B. Experimental Stem Cell Transplantation or Gene Therapy C. Intramuscular Injection for Fetus D. Prescription for Mother E. Transfusion by Umbilical Artery