Which of these is a malignant disorder of lymphatic tissue characterized by progressive enlargement of the lymph nodes?

a. hodgkin’s disease

b. sickle cell anemia

c. gastric ulcer

d. cirrhosis

Containing a negative consequence for the stability of the social system

If you or someone you know may have a mental disorder, it's important to discuss this concern with a trusted adult. t or f

Which of the following best reflects what we know about how the flu virus moves between species? a) the flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected. b) a flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans. c) an influenza virus gains new sequences of dna from another virus, such as a herpesvirus; this enables it to be transmitted to a human host. d) an animal such as a pig is infected with more than one virus, genetic recombination occurs, the new virus mutates, the virus is passed to a new species such as a bird, and the virus mutates again and can now be transmitted to humans.