Answer: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.
Explanation:
<span>Which humans control breeding of other organisms to favor certain traits, it is referred to as artificial selection.</span>
The presence of a controlled substance must be proven in both the blood and the organs before it can be considered as a cause of death.
A controlled substance is the one that is prohibited or available under strict regulations by the law of a country or state. These are usually the drugs that can result in addiction or serious diseases in an individual. Such substances are only available for medicinal purposes.
Blood is a red colored fluid present inside the body. It is red due to the presence of a pigment called hemoglobin. The blood is responsible for the transport of substances across the whole body, like oxygen, hormones, carbon dioxide, waste material, etc.
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