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.
Mountains are formed when there is movement in the Earth's crust. The collision of two plates causes the land to be pushed upwards, resulting in the formation of mountains. They may also be formed as a result of volcanic activity.The basic types of mountains are folded mountains, fault-block mountains, dome mountains and volcanic mountains.ountains are formed when there is movement in the Earth's crust. The collision of two plates causes the land to be pushed upwards, resulting in the formation of mountains. They may also be formed as a result of volcanic activity.