A Cow's Rumen,or First Stomach,provides the Ideal Environment for a Variety

Multiple Choice

A cow's rumen,or first stomach,provides the ideal environment for a variety of microbes.When a cow consumes grass,these microbes digest the grass,releasing nutrients both for their own and for the cow's use.While most of the microbes continue to live in the rumen,some of them are killed during the digestive process and provide additional nutrition for the cow.This complex relationship between the cow and her microbes has features of which two categories of interactions?

A) Mutualism and predation
B) Competition and mutualism
C) Commensalism and amensalism
D) Predation and parasitism
E) Amensalism and competition