Systemic lupus erythematosus, often abbreviated as SLE or lupus, is a systemic autoimmune disease (or autoimmune connective tissue disease) in which the bodyâs immune system mistakenly attacks healthy tissue.ystemic lupus erythematosus, often abbreviated as SLE or lupus, is a systemic autoimmune disease (or autoimmune connective tissue disease) in which the bodyâs immune system mistakenly attacks healthy tissue.
Natural selection will only cause evolution if there is enough genetic variation in a population. Before the discovery of Mendelian genetics, one common hypothesis was blending inheritance. But with blending inheritance, genetic variance would be rapidly lost, making evolution by natural selection implausible.
Although extinction is a natural process, the rate at which current extinction is taking place is clearly not, and all scientific evidence indicates that the activities of man kind are the primary engine behind most recent and present extinction events. Major causes of extinction include: Habitat Loss Destructive change to environments or landscapes, either through natural phenomena (such as floods, volcanoes, hurricanes etc.), or human processes (such as construction, deforestation, changing landuse for agriculture, artificial land drainage etc.), is the single greatest threat to the biodiversity of Planet Earth, and the greatest cause of extinction in our world.