â¢ The response of the innate system is rapid while that of the adaptive immunity is slow (Over 1-2 weeks). â¢ The innate system has limited and lower potency. In contrast, the adaptive system has high potency. â¢ The innate system recognizes a broad range of pathogens, but it cannot make fine distinctions.
As plant roots do not reach this layer, the C horizon is typically devoid of organic matter. R Horizon (Bedrock) The R horizon is basically the deepest soil horizon in the soil profile. Unlike the horizon above, this horizon does not comprise rocks or boulders, but instead is made of continuous mass of bedrock. It is very difficult to dig through this layer.
In regards to 3, the event horizon is an important part of the black hole, but it's not the only feature of the black hole. (hell, you can actually have certain types of event horizons without having black holes in the first place, but that's a whole other story.) The simplest black hole (a Schwarzchild black hole) has really two parts. A singularity, at r=0, which has mass but no volume and therefore infinite density and infinite spacetime curvature, and the event horizon, at r=2mG/c2.