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ANTONII [103]
3 years ago
15

How did Earth's atmosphere become oxygen-rich?

Biology
1 answer:
bekas [8.4K]3 years ago
4 0

D. Biological activity

Explanation:

The earth's atmosphere became oxygen rich as a result of biological activities. Early earth atmosphere was toxic one and in its reducing state.

  • The activities of micro-organisms such as cyanobacteria led to the production of oxygen.
  • These organisms manufacture their food in the presence of sunlight and water in the process of photosynthesis.
  • The bye product of this reaction is oxygen.
  • The intense presence of these living organisms led to the surge in atmospheric oxygen.

Learn more:

Photosynthesis brainly.com/question/4216541

#learnwithBrainly

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Does anyone know the meaning of "donor gene"? It's for my biology class.
asambeis [7]

Answer:

During conjugation, one bacterium serves as the donor of the genetic material, and the other serves as the recipient. The donor bacterium carries a DNA sequence called the fertility factor

Explanation:

6 0
3 years ago
Which is a urine test that measures glucose, ketones, and other substances in the urine?
Vikentia [17]
A urine test that would measure glucose, ketones and other substances would be called, Urine Dipstick. This is a test which helps measure out substances in the urine! I hope this helps!
6 0
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What process must metamorphic rocks undergo to become igneous rocks? (metamorphic rocks + ? = igneous rocks)
eduard

Answer:

Metamorphic rocks underground melt to become magma. When a volcano erupts, magma flows out of it. As the magma/lava cools it hardens and becomes igneous rock.

Explanation:

So alot of HEAT

7 0
3 years ago
Which is useful for high-throughput sequencing, but is not part of sanger dna sequencing?
Shalnov [3]

Roche/454 pyrosequencing , useful for high throughput sequencing techniques. This method utilizes pyrosequncing which allows for sequencing as the sequence read out can be achieved at the same time as the sequence is extended.

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Sanger DNA sequencing also known as chain termination. This method is used only for the single DNA fragment at a time. Amplicon sequencing with  NGS is efficient and cost effective . It is required a DNA  polymerase , nucleotide , dideoxynucleotides and buffer.

To learn more about High- throughput screening here

brainly.com/question/2509675

#SPJ4

5 0
2 years ago
What happens in an ecosystem when 1 resource is removed?
maxonik [38]

Answer:

i think the answer would be that everything else will change and adapt differently because something is missing.

3 0
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