The microorganisms which form a colony in the human vagina is called vaginal flora or vaginal microbiota. The genus <em>Lactobacilli</em> which are Gram-positive, rod-shaped bacteria and the genus <em>Clostridium</em><em> </em>also a Gram-positive bacteria make a colony in the vagina of the human female reproductive tract. The Lactobacilli bacteria produces lactic acid which protects women against the infection by pathogens. Thus, these bacteria impact on the overall health of women.
Weathering breaks down and loosens the surface minerals of rock so they can be transported away by agents of erosion such as water, wind and ice. There are two types of weathering: mechanical and chemical.
