Explanation:
HIV attacks a specific type of immune system cell in the body. It's known as the CD4 helper cell or T cell. When HIV destroys this cell, it becomes harder for the body to fight off other infections. When HIV is left untreated, even a minor infection such as a cold can be much more severe.
<span>B)Vertebrates appeared in the oceans before they moved on to land.
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True t<span>he only exception to organisms with different genetic codes are identical twins. Otherwise all organisms have differences in their genetic sequences that make them to at least a small degree unique</span>
A BCR is a ratio of the benefits of a project proposal expressed in monetary terms relatives to its costs also expressed in monetary terms all benefits and costs should be expressed in discounted present values. that's all I can think of I'm sorry if it didn't help
