In humans, B cells mature in the _____, and T cells mature in the _____.
A) GALT, liver
B) lymph nodes, spleen
C) bursa, thymus
D) bone marrow, thymus
Answer: D) bone marrow, thymus
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How are the epigenetic marks of a particular chromatin state preserved during cell division?
A. Parental, marked H2A-H2B dimers stay associated with strands after replication and recruit new H3-H4 tetramers. B. H2A-H2B dimers and H3-H4 tetramers come off during replication and assemble with unmarked histones. These new octamers then rebind to the newly replicated DNA to form nucleosomes. C. Parental, marked H3-H4 tetramers stay associated with strands after replication and recruit new H2A-H2B dimers. D. Histone chaperones make sure that at least one component of each new nucleosome is marked. E. None of these choices is correct.
Internal body temperature in humans is regulated primarily by behavioral mechanisms
Indicate whether the statement is true or false.
Chronic alcoholics often develop Wernicke-Korsakoff syndrome, which is characterized by a number of different
neurological symptoms, including ataxia (an abnormal gait). Which specific brain region is most likely responsible for this symptom?
a. Wernicke's area b. cerebellum c. prefrontal association cortex d. amygdala e. brain stem
Fertilization is internal in sharks
Indicate whether the statement is true or false