Flu-like Illness. One of the earliest HIV symptoms in men is a severe 'flu-like' illness, known as the 'seroconversion illness.'. Seroconversion is the point in time where a person's blood is converted from being HIV negative to HIV positive, by the production of antibodies.
Erosion causes the surface of mountains to be younger than the rocks that form the mountains themselves. Glacial processes produce characteristic landforms, such as pyramidal peaks, knife-edge arÃªtes, and bowl-shaped cirques that can contain lakes.
OF THE SIERRA NEVADA FOOTHILLS. Often called Yellow Pine, this is the most common and widely distributed of western conifers, and in the foothills is the main tree over large areas. Growing up to 225 feet high, its needles grow in bundles of three or sometimes two and three on the same tree.