Question

The guts of cow and buffalo possess
(A) Methanogens
(B) Cyanobacteria
(C) Fucus species
(D) Chlorella species

Answer 1

Hint: This bacterium belongs to Archaea.
It is a microbe that turns plant matter into fibers.

Complete answer: The cow's stomachs are four-chambered systems. The part producing methane is known as rumen. Rumen is a massive cavity capable of holding a bathtub worth of saliva and cud. This chewed-up muck is known as roughage. Humans get a lot of their fibre from indigestible plant-based food.
Cows can digest these plants, thanks to intestinal microbes called methanogens, which turn plant matter into fibre and methane.

Now, let us find the step-by-step solution from the given options-
1. Methanogens are primitive bacteria belonging to the Archaea that are capable of processing methane. These species may use carbon dioxide and hydrogen gas to produce methane. These species are present in marshy areas, in swamps and in the intestine of some animals. These species are responsible for producing methane in the stomach of cattle such as cows and buffaloes.
2. Cyanobacteria are a group of photosynthetic bacteria, some of which are nitrogen-fixing, which live in a wide variety of moist soils and water, either freely or in symbiotic relationships with plants or lichen-forming fungi.
3. Fucus is also known as rockweed. It is a genus of brown algae, abundant on rocky coasts and in salt marshes of temperate northern regions.
4. Chlorella is a single-celled green algae genus belonging to the Chlorophyta group. It is spherical in shape and without flagella. It includes the chlorophyll a and b coloured photosynthetic pigments in its chloroplast.

Thus, the correct answer is option A i.e.,Methanogens.

Note:Methane is formed in the rumen and in the hindgut of animals by a group of Archaeans known collectively as methanogens.