What is a patnogen?

What are contact forces and which forces are contact? How has science changed since 1995? What is any naturally preserved evidence of life? What are some bad things when having a baby? What is a serial number for acid pro 7? What is an SF813? What is the difference between petrifaction and permineralization? How much more does a wet cubic yard of sand weigh than dry cubic yard? Example of a machine in everyday life? What part number is BETWEEN numbers 20112 and 21017? What are the difference between a robot and a human? The safety precautions when using a test tube rack? What are the element of research methodology? What is HDF material? Give some list of investigatory projects about environment? The two-word system for naming organisms is called? What causes the sponge you leave on the counter for the night to be dry in the morning? What is geologic evolution? How does Zeus influence today? What was the discovery in the 15th century greatly advanced the progress of science?