Where in the lymph node do the T cells first encounter antigens presented by dendritic cells?
What will be an ideal response?
deep in the cortex
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Spontaneous mutation rates are greatly reduced by
A) exposure to ionizing radiation. B) reverse mutations. C) base-modifying agents. D) DNA repair mechanisms. E) performing the Ames test.
A 25-year-old woman has just had the Implanon or Nexplanon system inserted for contraception. Six months later, she is concerned because she is not menstruating. This is ________, and the reason is that she has an increased level of ________
A) abnormal; luteinizing hormone (LH) B) normal; progesterone C) normal; estrogen D) abnormal; follicle stimulating hormone (FSH)
Asexual reproduction in ascomycetes takes place by means of
A. conidia. B. ascospores. C. zygospores. D. motile gametes. E. ascogonia.
List the five major functions of the skeletal system.
What will be an ideal response?