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
kow [346]
4 years ago
8

When did Cyanobacteria start producing pure oxygen

Biology
2 answers:
AleksandrR [38]4 years ago
8 0

Answer:

After the hadeon

Explanation:

Travka [436]4 years ago
3 0

<u>Answer:</u>

Cyanobacteria start producing pure oxygen around 200 million years ago.

<u>Explanation:</u>

Many scientists believed that Earth did not have any oxygen. Cyanobacteria or the blue green algae are the microbes which produced oxygen for the first time with the help of photosynthesis.  This was around 4.5 billion years ago: after Hadean eon.

They were very simple, but they produced oxygen in the early earth’s atmosphere. So, they brought evolution on earth. This “blue-green algae” exists in salt water, rocks and soils and play a major role in maintaining the ecosystem.

You might be interested in
Identify the fungus type pictured below.
MatroZZZ [7]
That would be ascomycota or sac fungi. Sac fungi are characteristically known for producing ascus. This is a sac-like structure that contains haploid spores called ascospores. Some examples of sac fungi are yeast, truffles, morels and dead man's fingers. 
5 0
4 years ago
Read 2 more answers
Which action could a student take to make a longitudinal wave?
Pavlova-9 [17]

Answer:

B.

Explanation:

Because a Longitudinal wave is a wave vibrating in the direction of propagation.

3 0
3 years ago
Read 2 more answers
HELP!!! The species of finches that Darwin observed differed in the shape of their beaks according to Darwin all of the species
VikaD [51]

Answer:

I think it's A. Had a common ancestor

6 0
3 years ago
Which one contains many organelles with different functions prokaryotic cell eukaryotic cell​
skelet666 [1.2K]

Answer:

Eukaryotic Cell

Explanation:

Eukaryotic cells contain membrane-bound organelles, such as the nucleus, while prokaryotic cells do not. Differences in cellular structure of prokaryotes and eukaryotes include the presence of mitochondria and chloroplasts, the cell wall, and the structure of chromosomal DNA.

7 0
3 years ago
Read 2 more answers
What type of energy is used by your body when you eat food?
Aleks [24]
The answer to your question is <span>chemical energy

</span>
5 0
3 years ago
Other questions:
  • Which statement best defines biodiversity?
    11·2 answers
  • A 20-year-old male is hospitalized with a 4-day history of cough and a temperature of 41°c. chest sounds are dull to percussion.
    8·1 answer
  • In a repeated-measures experiment, each individual participates in one treatment condition and then moves on to a second treatme
    10·1 answer
  • What type of pollution is coming from this volcano
    10·1 answer
  • Distinguish between wilting and desplasymolysis​
    5·1 answer
  • Which is a common type of map projection?
    5·2 answers
  • What is the rough ER
    15·1 answer
  • Explain the presence of starch in the parts of a plant that do NOT contain chlorophyll.
    10·1 answer
  • I will give you 5 stars, points, and thanks if you answer this: Describe the positions of high and low pressure and the temperat
    12·1 answer
  • What are genetically modified crops?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!