Knowing the Structure of the HIV Tree Allowed Scientists to Pinpoint

question 53

Multiple Choice

Knowing the structure of the HIV tree allowed scientists to pinpoint which specific adaptation that allowed HIV to infect humans?

• A) an increase in virulence
• B) an enzyme that allows the virus to break down white blood cells
• C) a mutation in a gene that encodes the shell of the virus
• D) a mutation changing the shape of the hemagglutinin stalk

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Definitions:

White Pulp

Lymphatic tissue in the spleen composed of lymphocytes and macrophages, involved in the immune response.

Germinal Center

An area inside lymph nodes where mature B cells grow, evolve, and alter their antibody genes while responding to an immune challenge.

Afferent Vessels

Blood vessels that carry blood toward a particular organ or tissue, often referring to the vessels entering an organ.

Efferent Vessels

Blood vessels or lymphatic vessels that carry fluid away from an organ or tissue, as opposed to afferent vessels that bring fluid to it.