Why can't hiv be transmitted through air?

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred