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]
3 years ago
8

When did Cyanobacteria start producing pure oxygen

Biology
2 answers:
AleksandrR [38]3 years ago
8 0

Answer:

After the hadeon

Explanation:

Travka [436]3 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
The maintenance of homeostasis a. involves using material culture to make living possible in certain settings. b. involves the s
sweet [91]

Answer: C. Involves the replication of environmental conditions and human responces to those conditions

Explanation:

5 0
3 years ago
Which stage of cellular respiration yields the greatest number of atp molcules per glucose molecule? what is the name of this st
Paladinen [302]
That would be oxidative phosphorylation...this involves the electron transport chain; takes one NADH to make 2.5 ATP, one FADH2 to make 1.5 ATP...overall you make 34 ATP molecules.
8 0
3 years ago
In terms of signaling, what is most significant about action potentials?
joja [24]

Answer

b) the number of phases

Explanation:

  • Action potentials cannot be partial.
  • The frequency of signaling is constant.
  • The magnitude it constant as well.
3 0
2 years ago
Read 2 more answers
What type of wave moves the audio and visual signals?
Katyanochek1 [597]

Answer:

1. ( electromagnetic wave)

5 0
3 years ago
What does the law of conservation of energy state?
ElenaW [278]
Energy cannot be destroyed
3 0
3 years ago
Read 2 more answers
Other questions:
  • Okay I need help on this question
    11·2 answers
  • Which is the change in size of a group of organisms of the same species over time? A.population growth
    7·2 answers
  • __________ enter the lymph and need transport carriers to circulate in the bloodstream.
    8·2 answers
  • The ripened ovary of a flower which is adapted to disperse seed is called?
    8·1 answer
  • Washing a wound and covering it with a bandage and a glove is an example of
    12·1 answer
  • The pattern of inheritance can be predicted from data if one is given the parent or offspring genotypes or phenotypes. Two organ
    8·1 answer
  • Wetlands are important because they provide filters for pollution and they provide a habitat for many animals.
    5·2 answers
  • Is water dry or moist????
    7·1 answer
  • Here is data from a study on second-hand smoke and lung cancer: Ten thousand (10,000) people
    13·1 answer
  • A scientist constructs a graph to show the age structure that f the human population of county
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!