More than ________ % of all T cell precursors that enter the thymus do NOT survive the selection process
A) 15
B) 25
C) 45
D) 95
Answer: D
Biology & Microbiology
You might also like to view...
What is an undersea mountain called?
a. seamount b. sea caste c. trench d. estuary e. none of these
Biology & Microbiology
Helper T cells produce ____
a. cytokines b. antibodies c. plasma cells d. chemicals that cause apoptosis e. histamine
Biology & Microbiology
The accompanying figure represents a chromosome at metaphase of mitosis. How many DNA molecules are present in this chromosome?
A) one B) two C) four D) more than four E) impossible to determine
Biology & Microbiology
Mutations that cause sickness and death after reproduction:
a. are unlikely to occur. b. can be passed on to future generations. c. are passed on to future generations only in species that have long life spans.
Biology & Microbiology