1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
jolli1 [7]
3 years ago
8

Oxygen was into ally created in earths atmosphere by___.

Biology
2 answers:
Mariulka [41]3 years ago
7 0
Here something that might help 
<span>
Most scientists believe that for half of </span>Earth's<span> 4.6-billion-year history, the</span>atmosphere<span> contained almost no </span>oxygen<span>. Cyanobacteria or blue-green algae became the first microbes to produce </span>oxygen<span> by photosynthesis, perhaps as long ago as 3.5 billion years ago and certainly by 2.7 billion years ago.</span>
kompoz [17]3 years ago
4 0
Blue-green algae........
You might be interested in
How do humans impact the carbon cycle
Sedaia [141]

Answer:

Explanation:

Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. As a result, the amount of carbon dioxide in the atmosphere is rapidly rising.

3 0
3 years ago
Read 2 more answers
Make in you own words
svp [43]
When fixed carbon leaves the Calvin cycle or light dependent reactions, it will become the molecule G3P, which is then combined to make glucose. The rest of the carbon is recycled to replace RUBP.
3 0
2 years ago
If an Object has a density of 0.9 g/cm^3 and you put it into water with the flow or sink
vivado [14]
Answer: float

Explication: If the density is less than the waters then it will float
7 0
3 years ago
Tudo sobre câncer de pele,em que região mata mais e porque mata mais nessa região
Crazy boy [7]
Verdade? Não tenho certeza.......
8 0
3 years ago
A species that is involved in a facultative mutualism with another: a. can only interact with that particular species. b. should
Nutka1998 [239]

A species that is involved in a facultative mutualism with another: can utilize different resources outside of the mutualism.

Explanation:

  • Mutualism is a type of ecological relationship in which two organisms are related to each other in such a way that both of them could benefit from the relationship.
  • A type of mutualism in which the two organism cannot depend  on any other resource outside their mutualistic relationship is called obligate mutualism.
  • A type of mutualism, in which the participating organisms can opt for other resources outside their mutualistic relatonship i.e. they are not completely dependent on each other, is called facultative mutualism.
4 0
3 years ago
Other questions:
  • Mature nerve cells, which are not dividing, are most likely in<br> a. g1.<br> b. the s phase.
    11·1 answer
  • Which statement best explains why the development of a new area of science can lead to changes in a theory?
    10·1 answer
  • 1.Butter is an example of
    7·1 answer
  • 12. The organelle in the circle, which provides energy for the cell
    7·2 answers
  • What type of cell is a rose thorn
    11·2 answers
  • A batch of food contaminated with botulism exotoxin, consumed at a family reunion by most of the members of a family, would be a
    9·1 answer
  • Imagine you are a dietician. You are treating a patient who has diabetes. The patient can't have too many
    12·2 answers
  • Which part of the mantle is made off soft rock?
    11·2 answers
  • How many double-helical DNA molecules will be present in the sperm and egg cells of dogs that are diploid animals that contain 7
    15·1 answer
  • Wisdom teeth are the third and final set of human molars that come in during the late teens or early twenties. In some cases, th
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!