Crossing over can lead to an abnormal genome if the exchange is not done equally, which can lead to an in-utero death or congenital diseases.
<span>These extra calories are needed by people with HIV because their immune system is constantly fighting off the HIV virus. This is because HIV attempts to evade the infection even as the immune system attempts to eradicate it. The extra calories give the immune cells, which are extra strained, the energy to perform their functions.</span>
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They need energy to produce oxygen
