Will there soon be a vaccine for the virus causing AIDS? Explain.

What will be an ideal response?


HIV, like the flu virus, is a rapidly mutating one that produces new strains often enough to make it very difficult to produce a vaccine. It may be possible that an annual vaccine is needed, as is the case for the flu vaccine. Still, HIV mutates even more rapidly than the flu virus, and it would be difficult to trust the effectiveness of a vaccine when the virus it protects against changes so rapidly.

Biology & Microbiology

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A red blood cell was placed in a beaker of solution. The cell immediately began to swell and

ultimately burst. This happened because the cytoplasm of the cell was ____ to the solution in the beaker which was ____.

a. hypertonic; hypotonic b. hypotonic; hypertonic c. hypotonic; isotonic d. hypertonic; isotonic e. isotonic; hypotonic

Biology & Microbiology

The Calvin cycle can only produce sugar if ______ can enter through the pores of the leaves.

A. water B. O2 C. CO2 D. N2 E. potassium

Biology & Microbiology

What are lacunae?

Biology & Microbiology

Increasing the predation pressure on a prey population will radically alter the equilibrium sizes of both populations

a. true b. false

Biology & Microbiology