Anaerobic prokaryotes use obtain energy.
1) oxygen
2) sunlight
3)fermentation
4)nitrogen
archaea and eubacteria are prokaryotic in nature. one of the differentiating characteristics between them is that eubacteria their cell walls.
1)peptidolycan
2)chitin
3)cilia
4)chloroplast

Ans.

Fermentation is defined as a metabolic process, which involves breakdown of large organic compounds into simple compounds in the absence of oxygen. Anaerobic prokaryotes are those organisms that perform fermentation to obtain energy in the form of ATP.

Thus,  the correct answer is option 3). 'fermentation.'

The cell wall of archaea or archaebacteria is made up of proteins and polysaccharides. On the other hand, cell wall of eubacteria is composed of peptidoglycan molecules, made up of sugars and amino acid molecules. Peptidoglycan is absent in cell walls of archaea.

Thus, the correct answer is option 1). 'peptidoglycan.'

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.