________ infects the CD4+ T cells, which are required for normal immunity.
Fill in the blank(s) with the appropriate word(s).
HIV
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A cell contains 30% solute, while the external environment contains 10% solute. What kind of solution is this cell sitting in?
a. hypotonic b. isotonic c. hypertonic d. osmotonic
The enzyme lactase splits the lactose molecule into ____________ and ____________. Fill in the blank(s) with the appropriate word(s)
The fusion of two gametes produces a
A) zygote. B) schizont. C) chromatid. D) centromere. E) merozoite.
What are the functions of the sinuses?
A. to lighten the skull and drain fluid from the brain B. to allow the brain to expand and to lighten the skull C. to give a resonant sound to the voice and to allow the brain to expand D. to drain fluid from the brain and to allow the brain to expand E. to lighten the skull and give a resonant sound to the voice