0
The Paleozoic era was the era when oxygen-breathing organisms first thrived.
Bradly Kertzmann
Wiki User
∙ 15y agoAs best as is known, cyanobacteria date back to 2.8 billion years ago.
Add your answer:
Earn +20 pts
What is inferred to be the main source of the free oxygen that first entered earth's atmosphere?
oxygen producing organisms
Which of these statements is true about the oxygen revolution?
Cyanobacteria were the first organisms to produce oxygen in water, which then escaped into the atmosphere.
What forms of life do not require oxygen?
The first multicellular life does not need oxygen. That is the only type of life that does not need any oxygen at all basically. It is because a lot of organisms do not need the respiratory system at all.
How did oxygen become a part of earth's atmosphere and what did this increase in oxygen levels allow?
The majority of oxygen in the atmosphere come from photosynthesis. Aquatic Cyanobacteria (blue green algae) were the first known organisms to use photosynthesis, before there were land plants. The by product of photosynthesis is oxygen. This increase in oxygen eventually allowed organisms to use respiration as a method of energy production. Thus it allowed for land animals.
What are the Benefits of using oxygen?
Oxygen is used by people, plants and animals for respiration.
How would the increasing number of photosynthesizing organisms on earth have affected both earth and its other organisms?
As the first photosynthetic organisms increased in number, the concentration of oxygen in Earth's atmosphere began to increase. Organisms that could respire aerobically would have evolved and thrived. The sun's rays would have converted much of the oxygen into ozone molecules that would then have formed a layer that contained more ozone than the rest of the atmosphere.
Match the era on the left with its characteristic on the right?
Precambarian- When earth’s atmosphere formed Mesozoic- Ended with a massive impact Paleozoic- When oxygen-breathing organisms first thrived Cenozoic- Began about 65 million years ago Hope this helps! :)
What is inferred to be the main source of the free oxygen that first entered earth?
oxygen producing organisms
Why do scientists think that the first organisms did not need oxygen to survive?
Breathable oxygen, or O2, did not exist in large quantities in the atmosphere until after the evolution of photosynthetic organisms. Hence, early organisms had to have an anaerobic metabolism, or one that did not require oxygen. However, compounds containing oxygen, such as water, have always been necessary to organisms.
What came first oxygen or life?
Life came first. The oxygen in Earth's atmosphere is a product of living organisms carrying out photosynthesis.
What is inferred to be the main source of the free oxygen that first entered earth's atmosphere?
oxygen producing organisms
Which of these statements is true about the oxygen revolution?
Cyanobacteria were the first organisms to produce oxygen in water, which then escaped into the atmosphere.
How did oxygen get in your atmosphere?
Oxygen was released from Precambrian rocks. cynobacteria were the first organisms to produce oxygen 2.5-3 billion years ago
What organisms first introduced oxygen into earth's atmosphere?
Colonies of algae-like single celled organisms called stromatolites
Is there a life that doesn't need oxygen?
Yes. There are organisms called anaerobic bacteria which do not need oxygen. To some organisms, called obligate anaerobes, oxygen is actually toxic. The first living things on Earth were obligate anaerobes.
Which of these was the first source of oxygen in our atmosphere?
They were the oldest organisms called Stromatolites which did not need oxygen themselves but produced it by photosynthesis.
How do you control abnormal breathing of an infant?
As a first responder, it is difficult to control breathing. You keep the airway open, and if breathing is inadequate, you perform rescue breathing. If oxygen is available and you are trained, you may use it. If a BVM is available, with oxygen, that is the best case scenario. In a more controlled setting, such as a hospital, they may use medications and/or a respirator.
