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around about 2000 million years ago

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Q: When did the earth go from anoxic to oxic?
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What is the difference between anoxic and anaerobic condition?

Anaerobic = total absence of free oxygen (O2) or bound oxygen (NO2, NO3) Anoxic = absence of free oxygen, but presence of bound oxygen.


What term is used to describe water with too little oxygen to support life?

Anoxic.


How can you distinguish between a brain injury caused by hyponatremia and a brain injury caused by anoxia or hypothermia or bypass?

Hyponatremia occurs when there is a serious deficiency of sodium in the blood. Blood tests would be able to detect whether this is the problem.Anoxic brain injury is the result of a major lack of oxygen to the brain. When the brain doesn't receive proper amounts of glucose and oxygen, nerves in the cortex where cells originate are damaged. It takes about five minutes for lack of oxygen to permanently damage the brain. Anoxic brain injury causes diffuse damage, meaning that it causes damage throughout the brain. Causes of Anoxic Brain Injury There are three types of anoxic brain injury. Anemic anoxia is a result of blood that doesn't carry enough oxygen. Toxic anoxia is caused by toxins that block oxygen in the blood from being used. Anoxic anoxia occurs when no oxygen is supplied to the brain. Common causes of all three types include: * Respiratory arrest * Drowning * Heart attack * Carbon monoxide inhalation * Poisoning Symptoms of Anoxic Brain Injury While symptoms will vary based upon the area of the brain that's affected, common signs of anoxic brain injury include: * Cognitive issues * Weakness in arms and legs * Lack of coordination; abnormal movements * Visual problems * Emotional and behavioral problems Prognosis for Anoxic Brain Injury Degree and rate of recovery is highly dependent upon individual circumstances. The amount of time spent unconscious or in a coma, as well as how much is recovered within the first month, are good indicators of long-term recovery.http://www.brainandspinalcord.org/traumatic-brain-injury-types/anoxic-brain-injury/index.html


How do plants get nutrients from animals?

When the animal dies, it decaysand the nutrients from its body go back into the earth where they are absorbed by plants.


Can you use a sentence with the word Gravitropism?

Is gravitropism why the seed is growing towards gravity?Yes gravitropism is why the roots go towards the center of the Earth.

Related questions

The difference between oxic and anoxic soil?

Soil that contains oxygen is known as oxic soil. On other hand soil which lacks the oxygen is known as anoxic soil


Why was the change from anoxic to oxic atmosphere significant?

Because it allowed procariote autotroph cells (non-bound organelle cells which produce their own food) to develop because they now had oxygen available to perform photosynthesis.


Why is the change from an anoxic to an oxic atmosphere significant in the evolution of living things?

anoxic = no oxygen oxic = with oxygenallowed animals and plants to grow on landformation of the ozone layer was successful in trapping in oxygen and keeping out harmful radiationbefore then animals only lived in the water because of oxygen dissolved in water and only a few feet down protects against strong uv raysAir does not provide buoyancy support or nutrients; it is dry compared to tissue, and provides little or no buffering against solar radiation or temperature changes. To move from the water to land, plants and animals had to adapt systems that would support their weight, provide transport of water and nutrients, protection from drying out, and insulation from the sun and temperature changes.


Can plants live in anoxic soil?

Yes plants can live in anoxic soil. an example of a plant that can live in anoxic soil is the mangrove. A mangrove can live in anoxic soil because of little arial roots called pnuematophores that are not submerged by water during the day, this allows them to draw oxygen into the underground root system.


What rhymes with anoxic?

Toxic.


What has the author Johan Schijf written?

Johan Schijf has written: 'Aqueous geochemistry of the rare earth elements in marine anoxic basins' -- subject(s): Rare earth metals, Chemical oceanography


Does pleurococcus photosynthesise?

yes, anoxic photosynthesis


What are the main causes for anoxic brain injury?

The main causes for anoxic brain injury are lack of oxygen to the brain. This can be caused due to drowning, suffocation, shock or autoerotic asphyxiation.


What is without oxygen?

The terms for without oxygen are anaerobic or anoxic.


What is Stagnation deposits?

decreased microbial decomposition, often anoxic.


What has the author H B Hume written?

H. B. Hume has written: 'Technetium diffusion in clay-based materials under oxic and anoxic conditions' -- subject(s): Diffusion rates, Radioactive waste disposal in the ground, Clay, Technetium, Permeability 'Procedures and apparatus for measuring diffusion and distribution coefficients in compacted clays' -- subject(s): Clay, Environmental aspects, Environmental aspects of Radioactive waste disposal in the ground, Radioactive waste disposal in the ground


What is the difference between anoxic and anaerobic condition?

Anaerobic = total absence of free oxygen (O2) or bound oxygen (NO2, NO3) Anoxic = absence of free oxygen, but presence of bound oxygen.