Hand santitizer claims to kill 99.99% of all bacteria.what mechanism of evolution allows the 0.01% to survive and reproduce?

Spinal reflex refers to a reflex, which is directed by a nerve pathway with a sensory afferent to the spinal cord, linkages within the cord, and an efferent to muscle from the cord. The spinal reflexes take place in the absence of the influence of the brain.  

The following is the correct sequence of events of a spinal reflex:  

1. Something stimulates a sense, like heat, pain, or smell.  

2. The sensory receptors produce nerve signals, which travel along the sensory fibers via the dorsal-root ganglia towards the spinal cord.  

3. The posterior neurons conduct signals on to interneurons, some of which synapse with the motor neurons.  

4. The nerve signals travel to an effector-like a muscle that brings about a response.