Which of the following cells are destroyed by the HIV virus?
A. Helper T cells
B. Natural killer cells
C. B cells
D. Cytotoxic T cells
E. Plasma cells
Answer: A
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The most dangerous type of skin cancer is basal cell carcinoma.
Answer the following statement true (T) or false (F)
Typically located near the backs and shoulders, __________ tissue is particularly important for thermogenesis in small mammals and newborns of larger mammals
Fill in the blank with correct words.
Gene expression profiling produces karyotypes
Indicate whether the statement is true or false
Which of the following emphasizes mechanism over purpose?
a. a person breathes to obtain oxygen. b. a person sweats to cool off. c. a person's stomach secretes digestive juices because it is stimulated by the nervous system. d. a person's heart beats to pump blood. e. a person's kidneys produce urine to eliminate wastes from the body.