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If there was not an increase in cyanobacteria in early Earth, what would have happened to Earth’s early atmosphere? A. The amount of oxygen would have increased, causing an increase in aerobic autotrophs and heterotrophs B. The amount of oxygen would have increased, causing a decrease in aerobic autotrophs and heterotrophs. C. The amount of oxygen would have decreased, causing an increase in aerobic autotrophs and heterotrophs. D. The amount of oxygen would have decreased, causing a decrease in aerobic autotrophs and heterotrophs.

Respuesta :

1503204

Answer:

Explanation:

Anaerobic bacteria are able to survive in the absence of oxygen while aerobic bacteria survive only in the presence of abundant oxygen.

Hence, while reduced levels of dissolved oxygen in the pond decrease the amount of aerobic bacteria like Bacillus; anaerobic bacteria like Actinomyces flourish since they survive on organic substances like methane, cellulose instead.

Explanation:

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