Question

what type of archaea live in the guts of cows? a methanogens b thermophiles c methanophiles d halophiles

Explanation:

Methanogens are archaea that produce methane as a metabolic by - product in anaerobic conditions. Cows have anaerobic environments in their guts where methanogens can thrive and play a role in the digestion of plant material. Thermophiles prefer high - temperature environments, methanophiles consume methane, and halophiles thrive in high - salt environments, none of which are characteristic of the main archaea in cow guts.

Answer:

A. methanogens