Answer the following questions true (T) or false (F)
1. The antibodies involved in type III reactions can be made as part of an autoimmune response or formed as a normal response to foreign antigens.
2. A contributing factor to increasing latex sensitivities among healthcare workers is that wearing gloves on a regular basis often causes dry, cracked skin that may promote entry of the latex into the skin to trigger sensitization.
3. Immune-privileged sites include the eye, brain, uterus, and testicles.
1. TRUE
2. TRUE
3. TRUE
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The cyanobacterium Trichodesmium ________.
A. fixes a significant amount of N2 in oceanic environments B. uses nitrite as a source of nitrogen C. is a spherical organism D. fixes N2 during the day
Horizontal gene transfer is less prevalent in eukaryotic species because
A. of the presence of organelles in the cells of eukaryotic species. B. of the multicellularity in eukaryotic species, which is lacking in prokaryotic species. C. eukaryotic species reproduce by sexual reproduction. D. of multicellularity and sexual reproduction. E. of the presence of organelles and multicellularity.
Sexual dimorphism, as seen in the crayfish, is
a. the presence of male and female individuals. b. the production of eggs and sperm by the same individual. c. another term for copulation. d. the presence of observable differences between males and females.
Because of its function, this hormone is often called interstitial cell-stimulating hormone
A) LH B) inhibin C) FSH D) GnRH