How did cyanobacteria affect Earths atmosphere during the Proterozoic Eon?

Biology

1 answer:

dalvyx [7]3 years ago

7 0

Answer:

These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen. In fact, all the plants on Earth incorporate symbiotic cyanobacteria. For some untold eons prior to the evolution of these cyanobacteria, during the Archean eon, more primitive microbes lived the real old-fashioned way: anaerobically. These ancient organisms—and their "extremophile" descendants today—thrived in the absence of oxygen, relying on sulfate for their energy needs. But roughly 2.45 billion years ago, the isotopic ratio of sulfur transformed, indicating that for the first time oxygen was becoming a significant component of Earth's atmosphere,

You might be interested in

Which type of law is used to discipline members of the armed services?

sashaice [31]

Answer: D

Explanation: because they are in the military and that’s the only law I would recommend if someone needed discipline in the military

6 0

3 years ago

Why is mitosis a form of asexual reproduction?

Trava [24]

Because the exact copy of the parent cell is produced, only one organism is needed for it to occur.

6 0

3 years ago

In most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are _____. amoun

kari74 [83]

In most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are the amount of water and temperatures. Terrestrial ecosystems rely on the sun's energy to support the growth and metabolism of the organisms. Plants use the sunlight, then they supply the organisms that are higher up the food chain with energy and the structural buildings blocks of life. Water is also essential for the survival of these organisms.

4 0

3 years ago

Which of the following statements about cellular respiration are true?

siniylev [52]

Answer:

3rd

Explanation:

Cellular respiration occurs only in animals

8 0

3 years ago

When protein consumption is in excess of body needs and energy needs are met, the excess amino acids are broken down and the ene

ASHA 777 [7]

Answer:

Stored as fat

Explanation:

The body requires a variety of macro nutrients for building blocks to fortify the body and keep it functioning. One of the important building blocks are amino acids that are derived from proteins. These are broken down in the stomach by protein digestion enzymes by amylase, proteases and hydrochloric acid.

In the even that the body has taken in too many units of protein this will be stored in the liver as glycogen. This is a form of "animal carbohydrate" or "animal sugar."

The glycogen stores will remain there for a reservoir for energy whenever the body requires it. In the event of overeating the body will store the glycogen in a more concentrated form, fat via the fatty acid synthesis pathway.

3 0

3 years ago

Read 2 more answers