What are some risks of long term fasting?

What is the name of the tool scientists use to identify a species? species key dichotomous key species marker dichotomous marker

In multiple sclerosis, the immune system destroys the substance that coats and protects nerve fibers in the brain and spinal cord. this causes inflammation and injury to the nerves, and the axons don't conduct impulses as well.

The environments condition has an affect on the inhabitants true or false