What is the mechanism of evolution proposed by darwin? natural selection gene flow genetic drift gene pool

When the intestine becomes infected with the food borne illness bacteria e. coli, the bacteria releases a enterotoxin that causes excessive loss of water and electrolytes in the intestines. necessary to return the osmolality of the intestines to normal?

What statements describe a host organism?

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.