HIV weakens the immune system by killing

Biology

1 answer:

san4es73 [151]3 years ago

4 0

T-cells.These<span> are cells that help the immune system fight against disease and infections in the body. </span>

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important scientific tool used to identify different organisms, based the organism's observable traits

Explanation:

consist of a series of statements with two choices in each step that will lead users to the correct identification

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