Immunity in humans (Introduction)

by David Turell , Wednesday, November 20, 2013, 00:04 (4021 days ago)
edited by unknown, Wednesday, November 20, 2013, 00:26

The human mechanism is amazing. The immune system cells build up a library of answers (antibodies) to all sorts of foreign attacks (infections)by altering their DNA as the person's life proceeds from childhood until death!-Surprise, the same method is present in bacteria. Evidence of pre-planning!-"By analyzing 12 different strains of B. burgdorferi, the team found evidence there's strong selective pressure for the bacteria to develop a diverse collection of unused cassettes that would give them more varied surface proteins. Evolution doesn't need to be able to see the future to do this, the team writes. Selection for such a trait could happen during active infections, when host immune systems kill off less evolvable B. burgdorferi, or through reproduction, if more evolvable B. burgdorferi are more likely to produce offspring with a variety of cassettes."-http://www.popsci.com/article/science/can-organisms-evolve-ability-evolve-The article's issue about 'evolving to evolve' is obviously this necessary mechanism to answer attacks.The authors should read the literature. I'll bet it is present as a necessary defense mechanism thoughout all organisms, and was present in the original cells at the start of life as a necessary defense mechanism. It is not evolving to evolve.