Today, the SSC Science and Technology Part-2 exam was conducted smoothly in the morning session across all exam centers without ... anaerobic respiration. Answer:Yes, in the absence of oxygen ...

Bacteria used oxygen far earlier than expected, reshaping views on early life, evolution, and photosynthesis origins.

Scientists assumed most forms of life before the Great Oxidation Event didn't metabolize oxygen—but recent research suggests ...

So why do so many life-forms breathe oxygen? There are probably thousands of kinds of metabolisms, or chemical processes that ...

Microbial organisms dominate life on Earth, but tracing their early history and evolution is difficult because they rarely ...

Mitochondria are vital for almost every multicellular organism because they help us process oxygen to generate the energy we need to survive. Without mitochondria, the organism cannot rely on ...

Nevertheless, studies of ancient bacteria that still occur today in ecosystems without oxygen, e.g. in hot springs at the bottom of the ocean, suggest that a special form of respiration could have ...