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.
The Process of Evolution. According to evolutionists, the early cells evolved into the millions of species of organisms that have ever lived. In the process of evolution, a change, called a mutation, in the genetic code of an organism occurs because of radiation, chemicals, or a chance event. This change is then either kept or removed by natural selection. If the organism survives, it passes its traits on to its offspring.